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<p style="margin-top:0;margin-bottom:0">Hi,</p>
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<p style="margin-top:0;margin-bottom:0">Previously, I applied vtkThreshold with ThresholdByUpper and get the data extracted on 3D vtk dataset.</p>
<p style="margin-top:0;margin-bottom:0">For example, i could get 500 points out of 5000 points after the thresholding with a criterion of 0.085.</p>
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<div> vtkThreshold *thresh = vtkThreshold::New();</div>
<div><span style="white-space:pre"></span>thresh->SetInputConnection(meanCurve->GetOutputPort());</div>
<div><span style="white-space:pre"></span>thresh->ThresholdByUpper(0.085);</div>
<div><span style="white-space:pre"></span>thresh->AllScalarsOff();</div>
<div><span style="white-space:pre"></span>thresh->Update();</div>
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<p style="margin-top:0;margin-bottom:0">Now, my question is, how i can do this process in an opposite way.</p>
<p style="margin-top:0;margin-bottom:0">I want to get the threshold value which the number of the points are within 500-600. </p>
<p style="margin-top:0;margin-bottom:0">Instead of I am the one who providing the threshold value manually.</p>
<p style="margin-top:0;margin-bottom:0">//</p>
<p style="margin-top:0;margin-bottom:0">If meanCurve points 500-600 provide threshold value</p>
<p style="margin-top:0;margin-bottom:0">If meanCurve points 600-700 provide threshold value</p>
<p style="margin-top:0;margin-bottom:0">...and so on</p>
<p style="margin-top:0;margin-bottom:0">//</p>
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<p style="margin-top:0;margin-bottom:0">Thanks.</p>
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<p style="margin-top:0;margin-bottom:0">Best, </p>
<p style="margin-top:0;margin-bottom:0">Polly</p>
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