Function RANDPERG extends Matlab's RANDPERM by considering permutations of a grouped vector: if x is an n*1 data vector, and c is an n*1 vector of group assignments - so that x(i) belongs to group c(i) - randperg(x,c) returns an n*1 vector y where each c group retains the indexes it had in x [permutation is thus 'partial'], but its individual elements are randomly rearranged. See the function's help header for details.
Dimitri Shvorob (2021). Permute a grouped vector (https://www.mathworks.com/matlabcentral/fileexchange/14415-permute-a-grouped-vector), MATLAB Central File Exchange. Retrieved .
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Platform CompatibilityWindows macOS Linux
Inspired by: PARTPERM -- Partial random permutation of a vector, shake
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