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    <p>By default <code>mesh</code> will color surface values based on the (default) <code>jet</code> colormap (i.e. hot is higher). You can additionally use <code>surf</code> for filled surface patches and set the <code>'EdgeColor'</code> property to <code>'None'</code> (so the patch edges are non-visible). </p> <pre><code>[X,Y] = meshgrid(-8:.5:8); R = sqrt(X.^2 + Y.^2) + eps; Z = sin(R)./R; % surface in 3D figure; surf(Z,'EdgeColor','None'); </code></pre> <p><img src="https://i.stack.imgur.com/lYPXt.png" alt="enter image description here"></p> <p><strong>2D map</strong>: You can get a 2D map by switching the <code>view</code> property of the figure </p> <pre><code>% 2D map using view figure; surf(Z,'EdgeColor','None'); view(2); </code></pre> <p><img src="https://i.stack.imgur.com/MloE4.png" alt="enter image description here"></p> <p>... or treating the values in <code>Z</code> as a matrix, viewing it as a scaled image using <code>imagesc</code> and selecting an appropriate <a href="http://www.mathworks.com/help/matlab/ref/colormap.html" rel="noreferrer">colormap</a>. </p> <pre><code>% using imagesc to view just Z figure; imagesc(Z); colormap jet; </code></pre> <p><img src="https://i.stack.imgur.com/AZDRc.png" alt="enter image description here"> </p> <p>The color pallet of the map is controlled by <code>colormap(map)</code>, where <code>map</code> can be custom or any of the built-in colormaps provided by MATLAB: </p> <p><img src="https://i.stack.imgur.com/dP9eY.gif" alt="enter image description here"></p> <p><strong>Update/Refining the map</strong>: Several design options on the map (resolution, smoothing, axis etc.) can be controlled by the regular MATLAB options. As @Floris points out, here is a smoothed, equal-axis, no-axis labels maps, adapted to this example: </p> <pre><code>figure; surf(X, Y, Z,'EdgeColor', 'None', 'facecolor', 'interp'); view(2); axis equal; axis off; </code></pre> <p><img src="https://i.stack.imgur.com/Sd45L.png" alt="enter image description here"></p>
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    1. POHow can I make a "color map" plot in matlab?
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    1. POHow can I make a "color map" plot in matlab?
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    1. COVery nice answer (+1). If you add `'facecolor', 'interp'` as an additional named property, you would get smoother interpolation of the colors instead of the blocky appearance you are getting now... Also, if the vectors describing X and Y dimensions are `xv` and `yv`, you can get the axes to scale with `imagesc(xv, yv, Z)`; or turn the x and y axis labeling off with `axis off`. You will get the X and Y scaling to be the same with `axis image` - prevents the images from being stretched. Finally, if data starts out not being on a regular grid, you want to use the `griddata` function to resample.
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    2. CO@Floris great points all of the above! Will update to reflect some. Many of these and similar options though (resolution, coarse or fine, regular grid etc.) will depend on the data representation and the needs of the mapping.
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    3. COThanks - and you are right. But things like interpolation will help even with coarse data, and getting the axes to reflect the scale of X and Y correctly is in my mind essential. If you don't label them right, don't label them at all (`axis off`). Your answer was so good, I wanted to help make it even better.
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