How am I using set wrong?

I'm trying to use set to copy a set of fields from one struct to another. Here's a minimal (non)working example of what I'm trying to do:

foo = struct('fieldName1',[]);
bar = struct('fieldName2',[10 20 30]);
set(foo,'fieldName1',bar.fieldName2)

This gives an error:

Error using set
Conversion to double from struct is not possible.

But if I do

foo.fieldName1 = bar.fieldName2

the assignment is successful. However, this method is tedious for large numbers of fields.

How am I using set wrong here?

Answer 1

[Fangjun Jiang]

setfield(foo,'fieldName1',bar.fieldName2)

[Josh G.]

Thanks, I'd gotten so used to using set with figures and properties I forgot they were distinct from structs and fields.