for a given matrix, remove the row and column of every nan. Example
x=[1 2 NaN
4 5 6
7 8 9]
y= [4 5
Duplicate each element of a vector.
length of a vector
basic finance application
Problem 44444 !!! free beer everyone
short or buy ? take the opportunity
find the logic,easy one
Portfolio diversification: choose your stocks !
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