Adding numeric values to imagesc

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Tasi
Tasi 2015-3-31
评论： Tamar Regev 2024-2-27
How do I display the actual numeric values of a matrix plotted using 'imagesc'? I would like to have a number displayed in each colored box, representing a value of row and column plotted using 'imagesc' function.

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回答（3 个）

Image Analyst
Image Analyst 2015-3-31
  4 个评论
显示 2更早的评论
Tasi
Tasi 2015-3-31
This is an example of my matrix:
-4.0257 -2.1029 -60.5863 -23.3115 -18.6019 -11.0004
-19.5928 -3.1193 -21.1400 -7.0992 -11.3980 3.7057
-3.8306 0.1967 0.5895 3.3293 -1.1123 -0.3119
3.9556 -2.1975 -6.3927 1.9462 4.3546 -0.9120
-2.8013 -5.6693 2.0827 -27.5794 -8.8464 -23.8637
Column 7
-83.9344
-86.2478
-39.9361
-30.2867
-29.6367
I would like these values to be displayed inside the squares I get when I use imagesc, but I am not sure if this can be done with that function.
Image Analyst
Image Analyst 2015-3-31
imagesc() displays pixels. There is no way you can fit all of that into a single pixel and see it on your screen, not even with a microscope. The only way is to blow up the pixels to big patches like I showed you with the im2html program.

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Tamar Regev
Tamar Regev 2024-2-27
Just use the text function:
M = [1,2,3;4,5,6;7,8,9];
figure
figure
imagesc([1:3],[1:3],M)
set(gca,'XTick',[1:3],'YTick',[1:3],'fontsize',20)
for i = 1:3
for j = 1:3
text(i,j,num2str(M(i,j)),'FontSize',20)
end
end
Steven Lord
Steven Lord 2024-2-27
This function didn't exist when the question was originally asked, but I suspect the original poster had something like heatmap (introduced in release R2017a) in mind.

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