Input x is the sampled signal vector, may have both AC and DC components. output vector y should have AC components removed then change sign alternately, for example, input [1:5], output [3 -3 3 -3 3].
Get the area codes from a list of phone numbers
Vectorizing, too easy or too hard?
Basic arrays operations.
frame of the matrix
Calculate the derivative of a polynomial
Filter AC, pass DC
Distance walked 3D
How to add?
peta to nano (x-ray)
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