double2rgb

Converts an array of double (2D or 3D) to an RGB image using specified colormap

Computes the min and max values within the input array, convert to 256 values, and apply a colormap to produce a color image (RGB).

It is possible to specifies the range of values to consider, as well as the background color (used for NaN values).

Example:
% Display a default matrix
subplot(1, 2, 1);
imshow(peaks(128), []);
title('as double')
% display the coresponding RGB image
subplot(1, 2, 2); imshow(double2rgb(peaks(128), jet, [-8 8]));
title('as RGB');