Assign a 'double' variable to struct

I have a variable as such:

A.b = 'example';

And I want to change it to:

A.b.c = 2;

How can I do it without it prompting:

'Field assignment to a non-structure array object'

It worked on matlab's version before 2014.

Thank you,

Ziv

[Stephen23]

You can't.

You first define the field b as a double. You cannot then try to access field b as a structure.

[Steven Lord]

FYI this changed in release R2015b according to the Release Notes.

Answer 1

[Jan]

A.b = 'example';
A.b = struct('c', 2);  % Overwrite field "b"

Or:

A.b   = 'example';
A.b   = [];
A.b.c = 2

It is strange, that this works with the empty matrix, if it fails with an error for a char vector. But the first method is better, because it overwrites the field clearly.

[Ziv Kassner]

Great! The 1st method made it happen!