Set x value to each even index of vector y.
Rounding off numbers to n decimals
Is it column vector?
Sum of cubes
BASICS - sum part of vector
Find sum of negative elements in row.
Find cosine between two given vectors u and v.
For given xx,x, y vectors build spline of x and y and find yy values for xx vector.
Find the volume of cone
Find Euclidean norm of given vector u.
Display positive elements of matrix.
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