extract logical locations that match array

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ALDO
ALDO 2019-10-9
评论： ALDO 2019-10-9
Hi I know this might be simple but i have a logical array and another double arry with the same length. I want to extract the value of the locations in array two that correspond to to 1 in the logical array.
A=1 0 1 1 0
B= 77 5 2 8 9
I did the following
C=and(A,B)
D=B(C)
but it only gives me D= 77 2 8. I want the result to include zero for the locations that dont match. so ans would be D= 77 0 2 8 0
I would appriciate any help on this! Thanks in advance!

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Adam
Adam 2019-10-9
B .* A
would seem to give what you want

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