Matrix index replance of non Nan value

Hi there,

I have a matrix

x = [5 6 7;8 9 10; 11 12 NaN]

and another matrix with same as x,

y = [1 4 7;2 5 8; 3 0 9];

and I want to replace y with all the non nan vlaues of X

so for example I want y to be the following:

y = [5 6 9; 8 9 10;11 12 9];

Could anyone please help me with the right command for this?

I appreciate it a lot.

Best,

Nikan

Answer 1

[Walter Roberson]

x = [5 6 7;8 9 10; 11 12 NaN]
y = [1 4 7;2 5 8; 3 0 9];
mask = ~isnan(x);
y(mask) = x(mask);

Or you could do

newy = x;
mask = isnan(x);
newy(mask) = y(mask);