You have to generate a matrix with all possible combinations of n elements taken 2 at a time, without using nchoosek(1:n,2) :
if n = 3
if n = 5
so not cool!!
Check if sorted
letter yes yes & letter no no
Duplicate each element of a vector.
Matrix with different incremental runs
Generate a string like abbcccddddeeeee
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Create a matrix from a cell
Unique values without using UNIQUE function
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