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<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Hi Cory,</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Thanks for your reply.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I followed your advice and changed the lines as you mentioned.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
But I still couldn't get the output successfully.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I would like to clarify if I called the column of interest correctly.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Please refer to the attachment. The columns that to be called as X,Y,Z coordinates are named as "X", "Y", "Z".</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
When i run the exe file. It failed to load and couldn't get the correct cluster.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
This is the codes that I am using.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
..............</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<div>int main(int argc, char* argv[])<br>
</div>
<div>{</div>
<div>std::string inputFilename = argv[1];<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkDelimitedTextReader> reader =<br>
</div>
<div> vtkSmartPointer<vtkDelimitedTextReader>::New();<br>
</div>
<div>reader->SetFileName(inputFilename.c_str());<br>
</div>
<div>reader->SetFieldDelimiterCharacters(",");<br>
</div>
<div>reader->DetectNumericColumnsOn();<br>
</div>
<div>//reader->GetHaveHeaders();<br>
</div>
<div>reader->Update();<br>
</div>
<div><br>
</div>
<div>///////KmeansCluster<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =<br>
</div>
<div> vtkSmartPointer<vtkKMeansStatistics>::New();<br>
</div>
<div>kMeansStatistics->SetInputConnection(reader->GetOutputPort());<br>
</div>
<div>kMeansStatistics->SetColumnStatus("X", 1);<br>
</div>
<div>kMeansStatistics->SetColumnStatus("Y", 1);<br>
</div>
<div>kMeansStatistics->SetColumnStatus("Z", 1);<br>
</div>
<div>kMeansStatistics->RequestSelectedColumns();<br>
</div>
<div>kMeansStatistics->SetAssessOption(true);<br>
</div>
<div>kMeansStatistics->SetDefaultNumberOfClusters(5);<br>
</div>
<div>//kMeansStatistics->SetLearnOption(1);//to learn the cluster value<br>
</div>
<div>kMeansStatistics->SetMaxNumIterations(15);<br>
</div>
<div>kMeansStatistics->Update();<br>
</div>
<div><br>
</div>
<div>//// Display the results in CMD (each row)</div>
<div>kMeansStatistics->GetOutput()->Dump();<br>
</div>
<div><br>
</div>
<div>////Group the points according to ID number<br>
</div>
<div>vtkSmartPointer<vtkIntArray> clusterArray =<br>
</div>
<div> vtkSmartPointer<vtkIntArray>::New();<br>
</div>
<div>clusterArray->SetNumberOfComponents(1);<br>
</div>
<div>clusterArray->SetName("ClusterId");<br>
</div>
<div><br>
</div>
<div>for (int r = 0; r < kMeansStatistics->GetOutput()->GetNumberOfRows(); r++)<br>
</div>
<div>{<br>
</div>
<div> vtkVariant v = kMeansStatistics->GetOutput()->GetValue(r, kMeansStatistics->GetOutput()->GetNumberOfColumns() - 1);<br>
</div>
<div> std::cout << "Point " << r << " is in cluster " << v.ToInt() << std::endl;<br>
</div>
<div> clusterArray->InsertNextValue(v.ToInt());<br>
</div>
<div>}<br>
</div>
<div><br>
</div>
<div>//// Create a lookup table to map cell data to colors<br>
</div>
<div>vtkSmartPointer<vtkLookupTable> lut =<br>
</div>
<div> vtkSmartPointer<vtkLookupTable>::New();<br>
</div>
<div>int tableSize = (kMeansStatistics + 1, 10);<br>
</div>
<div>lut->SetNumberOfTableValues(tableSize);<br>
</div>
<div>lut->Build();<br>
</div>
<div><br>
</div>
<div>////ColorCells <br>
</div>
<div>vtkSmartPointer<vtkNamedColors> colors =<br>
</div>
<div> vtkSmartPointer<vtkNamedColors>::New();<br>
</div>
<div>lut->SetTableValue(0, colors->GetColor4d("Black").GetData());<br>
</div>
<div>lut->SetTableValue(1, colors->GetColor4d("Banana").GetData());<br>
</div>
<div>lut->SetTableValue(2, colors->GetColor4d("Tomato").GetData());<br>
</div>
<div>lut->SetTableValue(3, colors->GetColor4d("Peacock").GetData());<br>
</div>
<div>lut->SetTableValue(4, colors->GetColor4d("Lavender").GetData());<br>
</div>
<div>lut->SetTableValue(5, colors->GetColor4d("Flesh").GetData());<br>
</div>
<div>lut->SetTableValue(6, colors->GetColor4d("Raspberry").GetData());<br>
</div>
<div>lut->SetTableValue(7, colors->GetColor4d("Salmon").GetData());<br>
</div>
<div>lut->SetTableValue(8, colors->GetColor4d("Mint").GetData());<br>
</div>
<div>lut->SetTableValue(9, colors->GetColor4d("Wheat").GetData());<br>
</div>
<div><br>
</div>
<div>// Output the cluster centers<br>
</div>
<div><br>
</div>
<div>vtkMultiBlockDataSet* outputMetaDS = vtkMultiBlockDataSet::SafeDownCast(kMeansStatistics->GetOutputDataObject(vtkStatisticsAlgorithm::OUTPUT_MODEL));<br>
</div>
<div>vtkTable* outputMeta = vtkTable::SafeDownCast(outputMetaDS->GetBlock(0));<br>
</div>
<div><br>
</div>
<div>vtkDoubleArray* coord0 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("X"));<br>
</div>
<div>vtkDoubleArray* coord1 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Y"));<br>
</div>
<div>vtkDoubleArray* coord2 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Z"));<br>
</div>
<div><br>
</div>
<div>for (unsigned int i = 0; i < coord0->GetNumberOfTuples(); ++i)<br>
</div>
<div>{<br>
</div>
<div> std::cout << coord0->GetValue(i) << " " << coord1->GetValue(i) << " " << coord2->GetValue(i) << std::endl;<br>
</div>
<div>}<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkTableToPolyData> t2pd = vtkSmartPointer<vtkTableToPolyData>::New();<br>
</div>
<div>t2pd->SetInputConnection(kMeansStatistics->GetOutputPort());<br>
</div>
<div>t2pd->SetXColumn("X");<br>
</div>
<div>t2pd->SetYColumn("Y");<br>
</div>
<div>t2pd->SetZColumn("Z");<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkPolyDataMapper> mapper =<br>
</div>
<div> vtkSmartPointer<vtkPolyDataMapper>::New();<br>
</div>
<div>mapper->SetInputConnection(t2pd->GetOutputPort());<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkActor> actor =<br>
</div>
<div> vtkSmartPointer<vtkActor>::New();<br>
</div>
<div>actor->SetMapper(mapper);<br>
</div>
<div>actor->GetProperty()->SetPointSize(3);<br>
</div>
<div>actor->GetProperty()->SetColor(1, 1, 1);<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkRenderer> renderer =<br>
</div>
<div> vtkSmartPointer<vtkRenderer>::New();<br>
</div>
<div>vtkSmartPointer<vtkRenderWindow> renderWindow =<br>
</div>
<div> vtkSmartPointer<vtkRenderWindow>::New();<br>
</div>
<div>renderWindow->AddRenderer(renderer);<br>
</div>
<div>renderWindow->SetSize(640, 480);<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =<br>
</div>
<div> vtkSmartPointer<vtkRenderWindowInteractor>::New();<br>
</div>
<div>renderWindowInteractor->SetRenderWindow(renderWindow);<br>
</div>
<div><br>
</div>
<div>//renderer->AddActor(actor);<br>
</div>
<div>renderer->SetBackground(0, 0, 0); // Background color black<br>
</div>
<div><br>
</div>
<div>renderWindow->Render();<br>
</div>
<div>renderWindowInteractor->Start();<br>
</div>
<div><br>
</div>
<div>return EXIT_SUCCESS;<br>
</div>
<div>}<br>
</div>
<div>.........</div>
<div>Please advice. Thank you again!</div>
<div><br>
</div>
<div>Regards,</div>
<div>Polly</div>
<span></span><br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
</div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Cory Quammen <cory.quammen@kitware.com><br>
<b>Sent:</b> Monday, November 19, 2018 10:52 PM<br>
<b>To:</b> Polly Pui<br>
<b>Cc:</b> vtkusers<br>
<b>Subject:</b> Re: [vtkusers] Extract csv row and column into points</font>
<div> </div>
</div>
<div>
<div dir="ltr"><br>
<br>
<div class="x_gmail_quote">
<div dir="ltr">On Thu, Nov 15, 2018 at 1:26 AM Polly Pui <<a href="mailto:polly_sukting@hotmail.com">polly_sukting@hotmail.com</a>> wrote:<br>
</div>
<blockquote class="x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Hi Cory,</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Thanks for your reply.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-size:16px; background-color:rgb(255,255,255); display:inline!important">I edited my codes by following your advice. However, I am not able to visualize the point of cluster and got an error message.</span><br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-size:16px; background-color:rgb(255,255,255); display:inline!important"><br>
</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I have a few questions here.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Is it possible to call VTK unstructured grid data into vtkKmeansStatistics?</div>
</div>
</blockquote>
<div><br>
</div>
<div>No, vtkKMeansStatistics requires a vtkTable input (it is a subclass of vtkTableAlgorithm). vtkTable is different from a vtkPolyData, which is what you are trying to create. See more inline comments further down.</div>
<div> </div>
<blockquote class="x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Actually what i wanted to do is very simple. </div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I want to read my csv or vtk file and then cluster the points using kmeansclustering.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Initially, I extracted points from csv file manually and I could get my desired output. But it is too time consuming. </div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Currently, I want to input the csv or vtk file and get the cluster automatically and store in a datasheet.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I attach my code as follows:</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<div>#include <vtkVersion.h><br>
</div>
<div>#include "library.h"<br>
</div>
<div><br>
</div>
<div>#include <vtkSmartPointer.h><br>
</div>
<div>#include <vtkProperty.h><br>
</div>
<div>#include <vtkPointData.h><br>
</div>
<div>#include <vtkPolyData.h><br>
</div>
<div>#include <vtkXMLPolyDataWriter.h><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>std::string inputFilename = argv[1];<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkDelimitedTextReader> reader =<br>
</div>
<div> vtkSmartPointer<vtkDelimitedTextReader>::New();<br>
</div>
<div>reader->SetFileName(inputFilename.c_str());<br>
</div>
<div>reader->SetFieldDelimiterCharacters(",");<br>
</div>
<div>reader->DetectNumericColumnsOn();<br>
</div>
<div>reader->Update();<br>
</div>
<div><br>
</div>
<div>///////KmeansCluster<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =<br>
</div>
<div> vtkSmartPointer<vtkKMeansStatistics>::New();<br>
</div>
<div>kMeansStatistics->SetInputConnection(reader->GetOutputPort());<br>
</div>
<div>kMeansStatistics->SetColumnStatus("Column 3", 1);<br>
</div>
<div>kMeansStatistics->SetColumnStatus("Column 4", 1);<br>
</div>
<div>kMeansStatistics->SetColumnStatus("Column 5", 1);<br>
</div>
<div>kMeansStatistics->RequestSelectedColumns();<br>
</div>
<div>kMeansStatistics->SetAssessOption(true);<br>
</div>
<div>kMeansStatistics->SetDefaultNumberOfClusters(2);<br>
</div>
<div>//kMeansStatistics->SetMaxNumIterations(15);<br>
</div>
<div>kMeansStatistics->Update();<br>
</div>
<div><br>
</div>
<div>// Display the results in CMD (each row)<br>
</div>
<div>kMeansStatistics->GetOutput()->Dump();</div>
</div>
</div>
</blockquote>
<div> <br>
</div>
<blockquote class="x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<div></div>
<div><br>
</div>
<div>//Group the points according to ID number<br>
</div>
<div>vtkSmartPointer<vtkIntArray> clusterArray =<br>
</div>
<div> vtkSmartPointer<vtkIntArray>::New();<br>
</div>
<div>clusterArray->SetNumberOfComponents(1);<br>
</div>
<div>clusterArray->SetName("ClusterId");<br>
</div>
<div><br>
</div>
<div>for (int r = 0; r < kMeansStatistics->GetOutput()->GetNumberOfRows(); r++)<br>
</div>
<div>{<br>
</div>
<div> vtkVariant v = kMeansStatistics->GetOutput()->GetValue(r, kMeansStatistics->GetOutput()->GetNumberOfColumns() - 1);<br>
</div>
<div> std::cout << "Point " << r << " is in cluster " << v.ToInt() << std::endl;<br>
</div>
<div> clusterArray->InsertNextValue(v.ToInt());<br>
</div>
<div>}<br>
</div>
<div><br>
</div>
<div>// Create a lookup table to map cell data to colors<br>
</div>
<div>vtkSmartPointer<vtkLookupTable> lut =<br>
</div>
<div> vtkSmartPointer<vtkLookupTable>::New();<br>
</div>
<div>int tableSize = (kMeansStatistics + 1, 10);<br>
</div>
<div>lut->SetNumberOfTableValues(tableSize);<br>
</div>
<div>lut->Build();<br>
</div>
<div><br>
</div>
<div>//ColorCells <br>
</div>
<div>vtkSmartPointer<vtkNamedColors> colors =<br>
</div>
<div> vtkSmartPointer<vtkNamedColors>::New();<br>
</div>
<div>lut->SetTableValue(0, colors->GetColor4d("Black").GetData());<br>
</div>
<div>lut->SetTableValue(1, colors->GetColor4d("Banana").GetData());<br>
</div>
<div>lut->SetTableValue(2, colors->GetColor4d("Tomato").GetData());<br>
</div>
<div>lut->SetTableValue(3, colors->GetColor4d("Peacock").GetData());<br>
</div>
<div>lut->SetTableValue(4, colors->GetColor4d("Lavender").GetData());<br>
</div>
<div>lut->SetTableValue(5, colors->GetColor4d("Flesh").GetData());<br>
</div>
<div>lut->SetTableValue(6, colors->GetColor4d("Raspberry").GetData());<br>
</div>
<div>lut->SetTableValue(7, colors->GetColor4d("Salmon").GetData());<br>
</div>
<div>lut->SetTableValue(8, colors->GetColor4d("Mint").GetData());<br>
</div>
<div>lut->SetTableValue(9, colors->GetColor4d("Wheat").GetData());<br>
</div>
<div><br>
</div>
<div>// Output the cluster centers<br>
</div>
<div><br>
</div>
<div>vtkMultiBlockDataSet* outputMetaDS = vtkMultiBlockDataSet::SafeDownCast(kMeansStatistics->GetOutputDataObject(vtkStatisticsAlgorithm::OUTPUT_MODEL));<br>
</div>
<div>vtkSmartPointer<vtkTable> outputMeta = vtkTable::SafeDownCast(outputMetaDS->GetBlock(0));<br>
</div>
<div>//vtkSmartPointer<vtkTable> outputMeta = vtkTable::SafeDownCast( outputMetaDS->GetBlock( 1 ) );<br>
</div>
<div>vtkDoubleArray* coord0 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 0"));<br>
</div>
<div>vtkDoubleArray* coord1 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 1"));<br>
</div>
<div>vtkDoubleArray* coord2 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 2"));<br>
</div>
<div><br>
</div>
<div>for (unsigned int i = 0; i < coord0->GetNumberOfTuples(); ++i)<br>
</div>
<div>{<br>
</div>
<div> std::cout << coord0->GetValue(i) << " " << coord1->GetValue(i) << " " << coord2->GetValue(i) << std::endl;<br>
</div>
<div><br>
</div>
<div>}<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkPolyData> polydata =<br>
</div>
<div> vtkSmartPointer<vtkPolyData>::New();<br>
</div>
<div>polydata->GetPointData()->SetScalars(clusterArray);<br>
</div>
<div><br>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>The below won't work. vtkKMeansStatistics produces a vtkTable, while the vtkPolyDataMapper requires a vtkPolyData. To convert a vtkTable to a vtkPolyData, which is the key piece you are missing, use vtkTableToPolyData. This class iterates over the rows,
treats the columns you designate as X, Y, Z coordinates, and adds the remaining columns as point data arrays in the output vtkPolyData.</div>
<div><br>
</div>
<div>It will look something like this:</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkTableToPolyData> t2pd = vtkSmartPointer<vtkTableToPolyData>::New();</div>
<div>t2pd->SetInputConnection(kMeansStatistics->GetOutputPort());</div>
<div>t2pd->SetXColumn("name of column to be used as x-coordinate");</div>
<div>t2pd->SetYColumn("name of column to be used as y-coordinate");<br>
</div>
<div>t2pd->SetZColumn("name of column to be used as z-coordinate");<br>
</div>
<div><br>
</div>
<div>Now, change, the code below from:</div>
<div> </div>
<blockquote class="x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<div></div>
<div>vtkSmartPointer<vtkPolyDataMapper> mapper =<br>
</div>
<div> vtkSmartPointer<vtkPolyDataMapper>::New();<br>
</div>
<div>mapper->SetInputConnection(kMeansStatistics->GetOutputPort());</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>to</div>
<div><br>
</div>
<div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
vtkSmartPointer<vtkPolyDataMapper> mapper =<br>
</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
vtkSmartPointer<vtkPolyDataMapper>::New();<br>
</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
mapper->SetInputConnection(t2pd->GetOutputPort());</div>
</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
<br>
</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
That should do it.</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
<br>
</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
Cory</div>
<div> </div>
<blockquote class="x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<div>vtkSmartPointer<vtkActor> actor =<br>
</div>
<div> vtkSmartPointer<vtkActor>::New();<br>
</div>
<div>actor->SetMapper(mapper);<br>
</div>
<div>actor->GetProperty()->SetPointSize(3);<br>
</div>
<div>actor->GetProperty()->SetColor(1, 0, 0);<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkRenderer> renderer =<br>
</div>
<div> vtkSmartPointer<vtkRenderer>::New();<br>
</div>
<div>vtkSmartPointer<vtkRenderWindow> renderWindow =<br>
</div>
<div> vtkSmartPointer<vtkRenderWindow>::New();<br>
</div>
<div>renderWindow->AddRenderer(renderer);<br>
</div>
<div>renderWindow->SetSize(640, 480);<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =<br>
</div>
<div> vtkSmartPointer<vtkRenderWindowInteractor>::New();<br>
</div>
<div>renderWindowInteractor->SetRenderWindow(renderWindow);<br>
</div>
<div><br>
</div>
<div>renderer->AddActor(actor);<br>
</div>
<div>renderer->SetBackground(0, 0, 0); // Background color black<br>
</div>
<div><br>
</div>
<div>renderWindow->Render();<br>
</div>
<div>renderWindowInteractor->Start();<br>
</div>
<div><br>
</div>
<div>return EXIT_SUCCESS;<br>
</div>
<div>}<br>
</div>
<span></span><br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Thank you so much.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Regards,</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Polly</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
</div>
<hr style="display:inline-block; width:98%">
<div id="x_m_449269900065465368divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Cory Quammen <<a href="mailto:cory.quammen@kitware.com" target="_blank">cory.quammen@kitware.com</a>><br>
<b>Sent:</b> Tuesday, November 13, 2018 11:34 PM<br>
<b>To:</b> Polly Pui<br>
<b>Cc:</b> vtkusers<br>
<b>Subject:</b> Re: [vtkusers] Extract csv row and column into points</font>
<div> </div>
</div>
<div>
<div dir="ltr">
<div><span style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">Ah, so you want to use the </span><span style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">vtkKMeansStatistics filter. That filter
operates on vtkTable data. To use it, you don't need to create points at all. Instead, you can connect the
</span><span style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">vtkDelimitedTextReader directly to the </span><span style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">vtkKMeansStatistics filter
like so:</span></div>
<div><br>
</div>
<div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =<br>
</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
vtkSmartPointer<vtkKMeansStatistics>::New();</div>
</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
kMeansStatistics->SetInputConnection(reader->GetOutputPort());</div>
<div style="color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif; font-size:16px">
<div style="font-size:12pt">
<div>kMeansStatistics->SetColumnStatus("column1", 1);<br>
</div>
<div>kMeansStatistics->SetColumnStatus("column2", 1);<br>
</div>
<div>kMeansStatistics->SetColumnStatus("column3, 1);<br>
</div>
<div>kMeansStatistics->RequestSelectedColumns();<br>
</div>
<div>kMeansStatistics->SetAssessOption(true);<br>
</div>
<div>kMeansStatistics->SetDefaultNumberOfClusters(1);<br>
</div>
<div>//kMeansStatistics->SetMaxNumIterations(15);<br>
</div>
kMeansStatistics->Update();<br>
</div>
<div style="font-size:12pt"><br>
</div>
<div style="font-size:12pt">Here, I've altered your calls to SetColumnStatus() under the assumption you know the column names of interest.</div>
<div style="font-size:12pt"><br>
</div>
<div style="font-size:12pt">HTH,</div>
<div style="font-size:12pt">Cory</div>
<br class="x_m_449269900065465368x_gmail-Apple-interchange-newline">
</div>
<br>
<div class="x_m_449269900065465368x_gmail_quote">
<div dir="ltr">On Fri, Nov 9, 2018 at 10:16 AM Polly Pui <<a href="mailto:polly_sukting@hotmail.com" target="_blank">polly_sukting@hotmail.com</a>> wrote:<br>
</div>
<blockquote class="x_m_449269900065465368x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Hi,</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Thanks for your reply.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Is it possible to have more elaborations from you?</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
How can I get the number of points from vtkTableToPolyData?</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I got an error saying that vtkTableToPolyData has no members of GetNumberOfPoints.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I need those points to proceed to KmeansStatistics.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
This is my code:</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
......</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span>std::string inputFilename = argv[1];<br>
</span>
<div><br>
</div>
<div>vtkSmartPointer<vtkDelimitedTextReader> reader =<br>
</div>
<div> vtkSmartPointer<vtkDelimitedTextReader>::New();<br>
</div>
<div>reader->SetFileName(inputFilename.c_str());<br>
</div>
<div>reader->SetFieldDelimiterCharacters(" ");<br>
</div>
<div>reader->DetectNumericColumnsOn();<br>
</div>
<div>reader->Update();<br>
</div>
<div>int numberOfRows = reader->GetOutput()->GetNumberOfRows();<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkTableToPolyData> inputData =<br>
</div>
<div> vtkSmartPointer<vtkTableToPolyData>::New();<br>
</div>
<div>inputData->SetInputConnection(reader->GetOutputPort);<br>
</div>
<div><br>
</div>
<div>for (int c = 0; c < 3; ++c)<br>
</div>
<div>{<br>
</div>
<div> std::stringstream colName;<br>
</div>
<div> colName << "coord " << c;<br>
</div>
<div> vtkSmartPointer<vtkDoubleArray> doubleArray =<br>
</div>
<div> vtkSmartPointer<vtkDoubleArray>::New();<br>
</div>
<div> doubleArray->SetNumberOfComponents(1);<br>
</div>
<div> doubleArray->SetName(colName.str().c_str());<br>
</div>
<div> doubleArray->SetNumberOfTuples(inputData->GetNumberOfPoints());<br>
</div>
<div><br>
</div>
<div><br>
</div>
<div> for (int r = 0; r < inputData->GetNumberOfPoints(); ++r)<br>
</div>
<div> {<br>
</div>
<div> double p[3];<br>
</div>
<div> inputData->GetPoint(r, p);<br>
</div>
<div> doubleArray->SetValue(r, p[c]);<br>
</div>
<div> }<br>
</div>
<div> inputData->AddColumn(doubleArray);<br>
</div>
<div>}<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =<br>
</div>
<div> vtkSmartPointer<vtkKMeansStatistics>::New();<br>
</div>
<div><br>
</div>
<div>#if VTK_MAJOR_VERSION <= 5<br>
</div>
<div>kMeansStatistics->SetInput(vtkStatisticsAlgorithm::INPUT_DATA, inputData);<br>
</div>
<div>#else<br>
</div>
<div>kMeansStatistics->SetInputData(vtkStatisticsAlgorithm::INPUT_DATA, inputData);<br>
</div>
<div>#endif<br>
</div>
<div>kMeansStatistics->SetColumnStatus(inputData->GetColumnName(0), 1);<br>
</div>
<div>kMeansStatistics->SetColumnStatus(inputData->GetColumnName(1), 1);<br>
</div>
<div>kMeansStatistics->SetColumnStatus(inputData->GetColumnName(2), 1);<br>
</div>
<div>kMeansStatistics->RequestSelectedColumns();<br>
</div>
<div>kMeansStatistics->SetAssessOption(true);<br>
</div>
<div>kMeansStatistics->SetDefaultNumberOfClusters(1);<br>
</div>
<div>//kMeansStatistics->SetMaxNumIterations(15);<br>
</div>
<span>kMeansStatistics->Update();</span><br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span><br>
</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span>Thanks again.</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span><br>
</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span>Regards,</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span>Polly</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
</div>
<hr style="display:inline-block; width:98%">
<div id="x_m_449269900065465368x_m_3284076659041625668divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Cory Quammen <<a href="mailto:cory.quammen@kitware.com" target="_blank">cory.quammen@kitware.com</a>><br>
<b>Sent:</b> Friday, November 9, 2018 10:07 PM<br>
<b>To:</b> Polly Pui<br>
<b>Cc:</b> vtkusers<br>
<b>Subject:</b> Re: [vtkusers] Extract csv row and column into points</font>
<div> </div>
</div>
<div>
<div dir="ltr">vtkDelimitedTextReader -> vtkTableToPolyData is a pipeline that should make this much simpler.</div>
<br>
<div class="x_m_449269900065465368x_m_3284076659041625668x_gmail_quote">
<div dir="ltr">On Fri, Nov 9, 2018 at 1:14 AM Polly Pui <<a href="mailto:polly_sukting@hotmail.com" target="_blank">polly_sukting@hotmail.com</a>> wrote:<br>
</div>
<blockquote class="x_m_449269900065465368x_m_3284076659041625668x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Hi,</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Is there any clue that i can extract the row and column data from a csv file and read them as points?</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Currently I am using <span style="font-size:16px; background-color:rgb(255,255,255); display:inline!important">
vtkpoints to </span>read points by inserting points manually to my .cpp .</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Is it possible for me to call the csv directly and read the data (eg. column 3-5, row 2-10)?</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I attach my code here.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
......</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span>int main(int, char*[])<br>
</span>
<div>{<br>
</div>
<div><br>
</div>
<div>vtkSmartPointer<vtkPoints> points =<br>
</div>
<div> vtkSmartPointer<vtkPoints>::New();<br>
</div>
<div>points->InsertNextPoint(8.4312, -36.489, -1500.7);<br>
</div>
<div>points->InsertNextPoint(8.8408, -37.726, -1500.4);<br>
</div>
<div>points->InsertNextPoint(11.372, -37.787, -1501.5);<br>
</div>
<div>points->InsertNextPoint(11.263, -36.384, -1501.9);<br>
</div>
<div>points->InsertNextPoint(9.3914, -40.819, -1500.8);<br>
</div>
<div>points->InsertNextPoint(11.685, -42.482, -1502.7);<br>
</div>
<div>points->InsertNextPoint(14.235, -38.096, -1503.5);<br>
</div>
<div>points->InsertNextPoint(13.972, -43.051, -1504.2);<br>
</div>
<span>points->InsertNextPoint(9.22, -43.904, -1504);</span><br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span><br>
</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span><span>vtkSmartPointer<vtkTable> inputData =<br>
</span><span> vtkSmartPointer<vtkTable>::New();</span><br>
</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span><span><span>for (int c = 0; c < 3; ++c)<br>
</span>
<div>{<br>
</div>
<div> std::stringstream colName;<br>
</div>
<div> colName << "coord " << c;<br>
</div>
<div> vtkSmartPointer<vtkDoubleArray> doubleArray =<br>
</div>
<div> vtkSmartPointer<vtkDoubleArray>::New();<br>
</div>
<div> doubleArray->SetNumberOfComponents(1);<br>
</div>
<div> doubleArray->SetName(colName.str().c_str());<br>
</div>
<div> doubleArray->SetNumberOfTuples(points->GetNumberOfPoints());<br>
</div>
<div><br>
</div>
<div> for (int r = 0; r < points->GetNumberOfPoints(); ++r)<br>
</div>
<div> {<br>
</div>
<div> double p[3];<br>
</div>
<div> points->GetPoint(r, p);<br>
</div>
<div> doubleArray->SetValue(r, p[c]);<br>
</div>
<div> }<br>
</div>
<div> inputData->AddColumn(doubleArray);<br>
</div>
<span>}</span><br>
</span></span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Thank you very much.</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Regards,</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Polly</div>
</div>
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</blockquote>
</div>
<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="x_m_449269900065465368x_m_3284076659041625668x_gmail_signature">
Cory Quammen<br>
Staff R&D Engineer<br>
Kitware, Inc.</div>
</div>
</div>
</blockquote>
</div>
<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="x_m_449269900065465368x_gmail_signature">Cory Quammen<br>
Staff R&D Engineer<br>
Kitware, Inc.</div>
</div>
</div>
</div>
</blockquote>
</div>
<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="x_gmail_signature">Cory Quammen<br>
Staff R&D Engineer<br>
Kitware, Inc.</div>
</div>
</div>
</body>
</html>