Write a function that takes a vector X and returns the alternating sum of X:
for vector X=[1 2 3] the function should return 1-2+3=2.
Is it a number?
Concatenate two strings
Matlab Basics II - Extract last 3 elements of a vector
Create a vector
Test Problem; Create a 5x5 array containing all ones
Just another norm problem (JANP)
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