How can I use NaN padding instead of zero padding in a MATLAB array?

When I run the following example, zero padding is applied to the nonspecified indices of the array. I would like to have NaNs instead of zeros for the nonspecified indices.

X(1,1) = 7;

X(2,2) = 3;

X

This returns the following:

 X =

      7     0

      0     3

The desired result is:

 X =

      7     NaN

      Nan     3

Answer 1

[MathWorks Support Team]

The ability to use NaN padding with a single command is not available in MATLAB.

To work around this issue, you can replace all zeros with NaNs in your array using the following example:

X(1,1) = 7;

X(2,2) = 3;

X(X==0) = NaN;