Replace the numbers in an array

Hello, I have an array like

A[ ]: B[ ]:

-nan 2.1

0.63 4.2

-nan 2.8

-nan

0.35

1.2

-nan

and I need to replace only the numbers with the numbers of a second array B[ ]. Could you help me?

Answer 1

[James Tursa]

A(~isnan(A)) = B;