MATLAB: How to set the x axis on heatmap

2d histogramedgesheatmaphisthistcountsx axis

Hi all, I'm trying to plot a heatmap, but I'm not able to set up the x axis properly.
I have a data set that I run through this code to obtain a 2D histogram (that's what I'm aiming for)
[M,N]=size(data);
xbin=[0:0.2:8];
[counts,l]=histcounts(data(1,:),xbin);
result=counts;
for i=2:M
    [counts,l]=histcounts(data(i,:),xbin);
    result=[result; counts];
end
Then I try to plot the heatmap with this
ybin=[1:31];
heatmap(result,'Xdata',xbin,'YData',ybin);
colormap jet
But I get the error that lenght of xbin doesn't match the lenght of result.
I know that the error it's because xbin values are edges and not centers, so I end up having 1 extra value on the xbin var. Do you know how I could set up the edges value on the x axis? Thanks.
A workaround could be using hist instead of histcounts, so the values of xbin will be centers and not edges, but I'd like to avoid this solution.

Best Answer

You know the problem, you just have to decide what approach you want take. It's easy enough to use indexing to determine the points to use
heatmap(result,'Xdata',xbin(1:end-1),'YData',ybin);
If you do want to use the center point, try something like this
midpt = movmean(xbin,2,'Endpoints','discard');
heatmap(result,'Xdata',midpt,'YData',ybin);
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