change tick values heat map

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Roja Eliza 2022-6-30

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评论： Roja Eliza 2022-7-13

I want to set ticks to my heat map figure. I don't find any options to do it. It has automatically set it with numbers. also I want to add subscripts to the values inside the boxes.

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Chunru 2022-7-1

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It seems that "heatmap" has no properties for changing display text. You can use imagesc instead:

data = rand(4);

imagesc(data); colorbar

h = gca;

h.XTick= 1:4;

h.XTickLabel = ["A", "B", "C", "D"];

[xx, yy] = meshgrid(1:4, 1:4);

str = string(data(:));

str(1) = str(1)+"^B"; % Now you can specify the text anyway you like. This is an example

text(xx(:), yy(:), str, 'HorizontalAlignment', 'center')

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Chunru 2022-7-13

编辑：Chunru 2022-7-13

try colormap(jet) or colormap(hot)

doc colormap for more help

Roja Eliza 2022-7-13

what you have mentioned are in built color codes. I want the color grading to be from red to blue as given in my first picture. aslo with this code I am unable to make the background colour to be white instead of blue( grids with zero values). with heat map i used a file exchange but for this the exchange is not working

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