I want to gererate pseudorandom integers using randi function, however I want have empty cells between the integers.
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I want to gererate pseudorandom integers using randi function, however I want have empty cells between the integers, for example
1001011100 [] [] [] []100011[] [] [] []
Thank you in advance
2 Comments
Dyuman Joshi
on 19 Sep 2023
It's not possible to have empty "cells" (elements) in a numeric array.
There are workarounds possible involving cell arrays -
%Total length
N = 20;
y = num2cell(randi(2,1,N)-1);
%Amount of empty doubles to have in the cell array
n = 5;
k = randperm(N,n);
y(k) = {[]};
disp(y)
Bruno Luong
on 19 Sep 2023
Edited: Bruno Luong
on 19 Sep 2023
All those comments/answers about numerical array cannot have holes but I'm surprised nobody suggests to put instead NaN (aka double.missing) at the place where OP want to put empty array?
A = randi([0 1],1,20);
A(randi(end,1,4)) = NaN;
A
Accepted Answer
Steven Lord
on 19 Sep 2023
Numeric arrays in MATLAB can't have "holes".
Perhaps if you describe in more detail how you're hoping to use this type of array we may be able to suggest a data storage strategy that will facilitate your use case. It's possible, for example, that a sparse array may be what you're looking for.
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More Answers (1)
Walter Roberson
on 19 Sep 2023
It is not possible to have empty positions in a numeric array. You would need to use a cell array, such as
N = 3;
out = {};
for K = 1 : N
thislen = randi(10);
thispart = num2cell(randi([0 1], 1, thislen));
out = [out, thispart, {[] [] [] []}];
end
out
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