Generate vector according to sign of vector
Example: If A=[-2 0 5] then output must be[-1 0 1]
meaning that for negative number,value is -1.
meaning that for Positive number,value is 1. and for zero is 0.
"Low : High - Low : High - Turn around " -- Create a subindices vector
Returning a "greater than" vector
Create a two dimensional zero matrix
Product of Array
Find out Harmonic mean.
Find out Binomial coefficient
Add two different item as shown in example
Change the first and last diagonal element of the identity matrix to zero
Do operation as per given string
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