How to make certain values zero of a plotted fit object.
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Thomas Carter
on 30 Sep 2021
Answered: Thomas Carter
on 13 Oct 2021
I have plotted a "fit" object of a 3d matrix to provide a surface profile with the convenient spreadsheet type look. Each one represents a bioloigcal sample. There are some that fail and I would like color these black. I cannot access the data after "fit" has been done and I cannot "fit" data after making the failed cells=0. I altered the image in imagej to show an example of what I am hoping for.
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Walter Roberson
on 1 Oct 2021
Record the fit object, say F . Do not ask to plot the fit object.
Now invoke the fit object on the data
[X, Y] = ndgrid(linspace(0,2000,47),0:8:400);
prediction = reshape(F(X(:), Y(:)), size(X));
Now...
ADmask = ones(size(prediction));
Now assign ADmask to 0 at the places that there were fails.
Then
image([min(X),max(X)], [min(Y),max(Y)], prediction, 'Alpha', ADmask);
Now whatever is "under" the image will show through. (If you do not specifically put something black there, then your grey axes color is what is likely to show up.)
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