Sometimes heatmap does not display decimal values

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Peter Fraser 2021-10-14

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https://ww2.mathworks.cn/matlabcentral/answers/1563256-sometimes-heatmap-does-not-display-decimal-values

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

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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Mathieu NOE 2021-10-14

at least problem solved !!

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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