Calculate a return

Question

Cameron 2011-12-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/23549-calculate-a-return

Hi,

I am trying to calculate a return based on two arrays, mval and mvalprevday.

When I calculate a return as per the below formula my results return a lot of zeros. So I think Matlab is calculating a return for each possible combination of numbers.

Does anyone know how I can avoid getting many zeros. I basically think if I can tell Matlab to only calculate one result per row (I.e. column 1 in mval array * column 1 in mvalprevday array

rtn = mval / mvalprevday

rtn =

Columns 1 through 8
         0         0         0         0         0         0         0         0
         0         0         0         0         0         0         0         0
         0         0         0         0         0         0         0         0
         0         0         0         0         0         0         0         0
         0         0         0         0         0         0         0         0
         0         0         0         0         0         0         0         0
         0         0         0         0         0         0         0         0
         0         0         0         0         0         0         0         0
         0         0         0         0         0         0         0         0
         0