Given a vector of positive integers
a = [ 3 2 4 ];
create the matrix where the i th column contains the vector 1:a(i) possibly padded
b = [ 1 1 1
2 2 2
3 0 3
0 0 4 ];
Whether the input is vector?
Getting the indices from a vector
How long is the longest prime diagonal?
Reindex a vector
Derivative of polynomial
Set the array elements whose value is 13 to 0
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Create a vector whose elements depend on the previous element
Sophie Germain prime
Remove the two elements next to NaN value
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