Find sum of negative elements in row.
Example x=[1 -5 3 4 -6 6 7 8 9 10]
result = -11
Deleting an element in a matrix
find a specific element from an matrix
For given vectors x,y find coresponding spline coefficients.
Find cosine between two given vectors u and v.
Set x value to each even index of vector y.
Create a square matrix with given conditions
Calculate roots of polynomial given as vector array.
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