<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="gmail-Apple-interchange-newline"></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 9, 2018 at 10:16 AM Polly Pui <<a href="mailto:polly_sukting@hotmail.com">polly_sukting@hotmail.com</a>> wrote:<br></div><blockquote class="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="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="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="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="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="gmail_signature" data-smartmail="gmail_signature">Cory Quammen<br>Staff R&D Engineer<br>Kitware, Inc.</div></div>