plot shifting while using histcounts

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sani
sani 2020-3-16
评论： Rik 2020-3-16
Hi,
I'm trying to compare 2 spectrums but I get this shifting in the X-axis (the blue spectrum is processed data out the red one), my suspition is that it happened since I'm using histocounts.
this is the plot script:
[X,~] = histcounts(X_table.energy,2744);
semilogy(X,'r')
% xlim([1 2000])
hold on
[Z,~] = histcounts(Y,2744);
semilogy(Z,'b')
% xlim([1 2000])

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Rik
Rik 2020-3-16
You are specifying the number of bins, not the exact bins. Then when you are plotting you don't specify the x-value. If you change either of these the data should align again.
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sani
sani 2020-3-16
thanks a lot!
I did read the documentation but didn't understand the that I need to use edges.
Rik
Rik 2020-3-16
Well, you don't need to, but if you want to compare two sets of data you should be using the same bins, so you can't let Matlab figure out the bins automatically.

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