[vtkusers] vtkTable GetValueByName

[Cory Quammen]

You can use vtkVariant.ToDouble() to access the value as a double.

http://www.vtk.org/doc/nightly/html/classvtkVariant.html#add5f17851c142a9b522532dc9b59800a

On Sun, Nov 20, 2016 at 12:16 PM, Luis Vieira <luis.vieira at vektore.com> wrote:
> Hello vtkusers,
>
>
>
> I am trying to get values of some columns in my vtkTable. Below, you could
> see my table and how I am setting the values. Works fine. Then, I want get
> some values by ColumnName (“ThistheColumn1”) instead of to inform row number
> and column number as well as vtk examples shows. I know of the existence of
> the function vtkVariant vtkTable::GetValueByName         (vtkIdType const
> char *            ). However, I don’t know how to apply in my particular
> case that is vtkDoubleArray and that I have to use this value as double and
> not as variant.
>
>
>
>               tableLine = vtkSmartPointer<vtkTable>::New();
>
>
>
>               vtkSmartPointer<vtkDoubleArray> ThistheColumn1 =
>
>                       vtkSmartPointer<vtkDoubleArray>::New();
>
>               ThistheColumn1 ->SetName("ThistheColumn1");
>
>               tableLine->AddColumn(ThistheColumn1);
>
>
>
>               vtkSmartPointer<vtkDoubleArray> ThistheColumn2 =
>
>                       vtkSmartPointer<vtkDoubleArray>::New();
>
>               ThistheColumn2->SetName("ThistheColumn2");
>
>               tableLine->AddColumn(ThistheColumn2);
>
>
>
>               for (unsigned int r = 0; r < numberRowsLine; r++)
>
>                       {
>
>
>
>                              for (unsigned int c = 0; c <
> modelLine->columnCount(); c++)
>
>                              {
>
>                                     QString sh = modelLine->item(r,
> c)->data(Qt::DisplayRole).toString();// .toString();
>
>                                     tableLine->SetValue(r, c,
> sh.toLatin1().constData());
>
>
>
>                              }
>
>                       }
>
>
>
> vtkDocumentation to get values
>
>
>
> vtkVariant v = table->GetValue( r,c);
>
>     std::cout << "(r,c) = (" << r << "," << c << ") = " << v << std::endl;
>
>
>
> Thank you very much for any help.
>
>
>
> Luis Vieira,
>
> Consultant, Software Engineer
>
> Vektore Exploration Consulting Corporation
>
> ca.linkedin.com/in/joaoluisvieira
>
> luis.vieira at vektore.com
>
> www.vektore.com
>
>
>
>
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-- 
Cory Quammen
Staff R&D Engineer
Kitware, Inc.