Created random sequence based on predefined vector

Given a vector

SP = [1 2 4 5 8 11 13 14 15 16 18 19 20];

I want to create random sequence based on the vector

Y = [4 24 35 8 9 20 42 40 12 13 49 22 32];

It means that in the random sequnce I want element one repeated 4 times, element 2 repeated 24 times, element 4 repeated 35 times, element 5 repeated 8 times, element 8 repeated 9 times and so on.

Hence, the length of the final sequence will be equal to the cumulative sum of Y

4 + 24 + 35 + 8 + 9 + 20 + 42 + 40 + 12 + 13 + 49 + 22 + 32 = 310

Answer 1

[madhan ravi]

v = repelem(SP,Y);
W = v(randperm(numel(v))) % numel(W)

[luca]

May you kindly explain how it works?

[madhan ravi]

help repelem
help randperm