MATLAB: How to change color to an imagesc graph

imagesc colorbar

Hi! A project I‘m working on involves doing a color graph to show a 2D array. I used imagesc() to do it and showed the colorbar. In the color graph, the value 0 corresponds to color blue. Is there a way to change the color in the imagesc() function so that I could assign a specific color to a specific value?

Thank you!!

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https://www.mathworks.com/matlabcentral/answers/77736-how-to-change-colorbar-s-color-in-some-particular-value-interval

Related Solutions

MATLAB: Change a specific color(assigned to a value) con a colorbar

cmap = colormap;       %current map
cmap(1,:) = [1 1 1];   %make first color white
colormap(cmap);        %put it into effect

MATLAB: Imagesc() contour superposition

It is difficult to provide exact solution without the exact data but the following is a demo code which superimposes a contour() plot over an imagesc() plot while assigning different colormaps to each of them.

% Plot first data 
ax1 = axes; 
imagesc(ax1,imread('cameraman.tif'));
axis square; hold all;  
% Plot second data 
ax2 = axes; 
contour(ax2,imread('cameraman.tif'));
axis square; hold off;
% Only to reverse the y axis,
set(ax2,'ydir','reverse')
% Link axes 
linkaxes([ax1,ax2]) 
% Hide the top axes 
ax2.Visible = 'off'; 
ax2.XTick = []; 
ax2.YTick = []; 
% Add differenct colormap to different data if you wish 
colormap(ax1,'gray'); % Colormap for the imagesc plot
colormap(ax2,'hsv'); % Colormap for the contour plot

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Related Solutions

MATLAB: Change a specific color(assigned to a value) con a colorbar

MATLAB: Imagesc() contour superposition

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