How to avoid or delete Nan values in addtion?

if i have2 matrix

A=[2 NaN ; 3 NaN]  
B=[NaN 4 ; NaN 5]

I want C as

[2  4 ; 3 5 ]

edited by guillaume: Nan is not valid in matlab. NaN or nan is.

Answer 1

[madhan ravi]

A=[2 NaN ; 3 NaN]  %Edited
B=[NaN 4 ; NaN 5]

A(isnan(A))=0
B(isnan(B))=0

C=[A;B]'

[Shubham Mohan Tatpalliwar]

this is not working for larger matrices as 200*1000

[Shubham Mohan Tatpalliwar]

Can i change Nan values to zero and then add both matrices?

that would be more clearer and easier i guess?

[madhan ravi]

Check the edited code

Answer 2

[Guillaume]

If I understood correctly,

 C = sum(cat(3, A, B), 3, 'omitnan')