XYPlotActor

[Steve Guerrero]

Hello,

I am new to VTK so please forgive me if this is obvious.

I am trying to use the XYPlotActor object to create a simply plot of one
variable against another.

For example:
x = [0, 1.5, 6.2, 10.2]
y = [8, 9.3, 10.9, 27]

I would like to plot y as a function of x,

I tried the approach below but it does not seem to work.  My approach
was to create a 1 dimensional rectilinear grid data set and set the
Xcoordinates to the vector given above.  The Y data looks fine.
Unfortunately, the X axis seems to be the point IDs as opposed to the
values in the vector above.   Is this the wrong approach?  Any help
would be appreciated.

Thanks,
-Steve Guerrero

int dataSize = 4;
float x[4] = { 0, 1.5, 6.2, 10.2 };
float y[4] = {8, 9.3, 10.9, 27};
vtkRectilinearGrid *curve1 = vtkRectilinearGrid::New();
 curve1->SetDimensions(dataSize,1,1);
 vtkFloatScalars *dataValues = vtkFloatScalars::New();
 vtkFloatScalars *xCoords = vtkFloatScalars::New();

int w;
 for(w=0; w<dataSize; w++)
 {
  dataValues->InsertScalar(w, y[w]);
  xCoords->InsertScalar(w, x[w]);
 }

 curve1->SetXCoordinates(xCoords);
 curve1->GetPointData()->SetScalars(dataValues);

 vtkXYPlotActor *theXYPlot = vtkXYPlotActor::New();
 theXYPlot->SetXValuesToArcLength();
 theXYPlot->AddInput(curve1);



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