Problem 308. Matrix with different incremental runs

Created by Julio

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Given a vector of positive integers a (>=0); How does one create the matrix where the ith column contains the vector 1:a(i) possibly padded with zeros:

in->a = [3 2 4];

out->b = [1 1 1;2 2 2;3 0 3;0 0 4];

Solve

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Last solution submitted on Apr 09, 2019

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Julio on 12 Feb 2012

yes of course. Leading solution:
function b = matInc(a)
[b aa] = ndgrid(1:max(a), a);
b(b > aa) = 0;
end
regards,

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Problem 308. Matrix with different incremental runs

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Problem 308. Matrix with different incremental runs

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