work with two filtering criteria

A=[2 5 NaN 10 NaN 1 NaN 20 1 10];
B=[Nan 3 5 50 NaN 1 89 11 5 9];

1st I had to get rid of pairs which had NaN in either A or B. So I got A1 and B1 to be A1=[5 10 20 1 10]; B1=[3 50 11 5 9]; Then I removed data from B which are greater than 10. So I left with B2=[3 5 9]. My question is how to get corresponding values from A1. ie. how to get A1=[5 1 10]?

Answer 1

[Walter Roberson]

mask = B1 <= 10
A1(mask), B1(mask)