Find cosine between two given vectors u and v.
u = [5 2 0 5 3 0];
v = [3 2 5 1 0 2];
result = 0.4611;
Times 2 - START HERE
Whether the input is vector?
Replace every 3rd element in a vector with 4
Area of a circle
Find sum of negative elements in row.
Find Euclidean norm of given vector u.
Convert array of decimal numbers into hexadecimal numbers array.
Count given word x in text.
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