Plotting negative values on an histogram

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Samuele Bolotta
Samuele Bolotta 2021-4-17
回答： Image Analyst 2021-4-17
I am plotting some values on an histogram.
figure
histogram('Categories',Categories,'BinCounts',[-72 -63 -54 -56],'BarWidth',0.5,'FaceColor','#EDB120')
xlabel('Membrane potential');
ylabel('Rest Memb Pot (mV)');
title('Amplitude of AP');
The problem is that whenever one of the values for BinCounts is negative, I get this error:
Error using histogram (line 156)
Expected input number 4, BinCounts, to be nonnegative.
While everything works perfectly if the values are all positive.

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采纳的回答

Image Analyst
Image Analyst 2021-4-17
Or maybe that's the data??? It doesn't make sense to have a negative count. If you want bars that go negative, use bar() not histogram().

更多回答（1 个）

Bjorn Gustavsson
Bjorn Gustavsson 2021-4-17
It seems likely that you've mixed up BinCounts and BinEdges - it doesn't make much sense to have a negative number of something in a bin (perhaps in economics if we're talking about debts?).
HTH

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