Changing <undefined> in a table to NA

Hello. I feel this should not be too hard but I still can't seem to figure it out. I have a 2500x14 table, in random spots throughout the table some are '<undefined>', I want to change all of those undefined to 'NA'. I tried working with isundefined but always end up with an error. Thank you in advance for the help!

Answer 1

[Cris LaPierre]

I suggest trying to use fillmissing.

B = fillmissing(A,'constant','NA');

[Claire Hollow]

Thank you. I tried

B=fillmissing(A(:,7),'constant','NA');

becuase right now I am just trying for the 7th column but it doesn't change anything and I am not receiving an error either. Any ideas on what I could be missing?

[Claire Hollow]

Never mind I got it working now. Thank you so much for the help!

[Abdulah Al Mubin]

Could you please share your solution?