MATLAB: “Bytes” is 0 in Variable Editor

Question

a.data=rand(100,1);
b=dlnode(rand(100,1));

Then you'll find in Variable Editor the "Bytes" of a.data or b.data is 0!

Why?

Verified on 2008a and 2010b.

While it's correct in Workspace Window.

Thanks a lot.

Answer 1

If you do a=struct() or b=[], you will see that the variable a and b have been declared but not assigned value. Thus, a and b have not taken any memory bytes to store the value. Once you assign a value, the number of bytes will change depending on the size of the data stored.