Random Integers With a Specified Sum and Range

Generate random integers with specified sum and parameters from various distributions.

The function randisum() can draw random integers from a specified distribution, subject to user-specified sum and boundary constraints. Supported distributions are 'uniform', 'skew', 'exponential', and 'gaussian'.

Consider the simplistic example:

% Subdivide a vector into 10 randomly-sized blocks
x = 1:100;
blocksizes = randisum(5,numel(x),[1 10]);
xc = mat2cell(x,1,blocksizes);

I make no claims that these are particularly efficient, robust, or statistically meaningful ways to solve this problem.

Webdocs for randisum():

http://mimtdocs.rf.gd/manual/html/randisum.html

These tools are part of the MIMT:

https://www.mathworks.com/matlabcentral/fileexchange/53786-image-manipulation-toolbox