How to reset the label range for a heatmap?

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Tianming Qu 2023-1-9

评论： Tianming Qu 2023-1-9

采纳的回答： dpb

Hi all,

I am new to Matlab, could anyone help me on how to reset the label range of a heat map?

Following is my code and my result fig

T=readtable('water_density_map_cumulative_10172022/7500.dx.csv');

A = table2array(T);

A_interp = interp2(A,7);

colormap turbo

!imagesc(A_interp);

colorbar()

I2disp = A_interp;

I2disp(I2disp(:)<0.009) = nan;

pcolor(I2disp([1:end,end],[1:end,end])),shading flat,axis ij

The heatmap form is 4000*4000 and the fig label is just 0-4000 for both x and y, however I want it range from, 0-30, is there any way I can do this?

Thanks for any help!

dpb 2023-1-9

Sure. Use the alternate form for pcolor with the requested X, Y coordinates...

C=I2disp([1:end,end],[1:end,end];       % a temporary for convenience
[nR,nC]=size(C);
X=linspace(0,30,nC);
Y=linspace(0,30,nR);
pcolor(X,Y,C)

dpb 2023-1-9

Glad to...moral is we can't fix what we can't see... :)

If the Answer provided the solution to the Q?, please Accept it if for no other reason to let others know it isn't still pending...

Tianming Qu 2023-1-9

I just accepted it as the answer. Thanks for the help

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