how to replaces NaN's with a corresponding vector?

I have two vectors x=[1 NaN 2 3 NaN 4 NaN NaN NaN 5 ]; y=[10 11 11 6 8 9 7 2 29 93 ]; I would like to know if there is a way to replace only the missing values (NaN's) in x with the corresponding value in the vector y?

Answer 1

[Walter Roberson]

mask = isnan(x)
x(mask) = y(mask)