Sometimes heatmap does not display decimal values

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Peter Fraser
Peter Fraser 2021-10-14
评论： Peter Fraser 2021-10-14
I have data sets representing pressures. These are represented by a matrix of 16 x 16 x 400(ish), representing a time pressure sequence of 400 temporally-ordered frames of a 16 x 16 array of 256 pressure sensors. I wanted to display the time maximum (using heatmap()) for each pressure sensor, and that worked exactly as expected. I display two alternative data sets side by side (using subplot), and get theit color-mapped squares with values, as expected. If instead I look at the temporal average, I only get the color mapped squares without the the decimal values.
If I insert a breakpoint, and issue:
heatmap(peaks1); colormap default
or
heatmap(av1); colormap default
both work as expected, but the following code:
f=figure;
f.Position = [0 128 1920 1280];
peaks1 = max(p_seq1, [], 3);
peaks2 = max(p_seq2, [], 3);
av1 = mean(p_seq1, 3);
a2 = mean(p_seq2, 3);
subplot(1,2,1);
% heatmap(av1);
heatmap(peaks1); % displays text correctly
colormap default
title([gait, ' - ', horse, ' (OS)']);
subplot(1,2,2);
heatmap(av2); % displays no text
% heatmap(peaks2);
colormap default ;
title([gait, ' - ', horse, ' (EQ)']);
filename = [horse, ' - ', gait, '.jpg']
saveas(f, filename);
doesn't display text for the av1 heatmap.
To further confuse things, one out of the 20 or so datasets I am using does display the average values, but I have no idea why.
Both the av and the peak show in the workspace as 16x16 double.
Thoughts?
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Peter Fraser
Peter Fraser 2021-10-14
Yes! I first tried the multiply-round-divide trick in the command window, and it didn't work (it gives four places after the decimal point, with the last three "zero". Fortunately it does work with heatmap.

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