Find sum of negative elements in row.
Example x=[1 -5 3 4 -6 6 7 8 9 10]
result = -11
Remove the two elements next to NaN value
Cumulative product of a vector
Replace values under a limit
Display positive elements of matrix.
Select primes from the matrix.
Pointwise multiplication of vectors.
Create a square matrix with given conditions
Sum positive elements of matrix.
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