Indexing structured arrays

I have a two structures that have identical fields, but different lengths. I want to append part of one structure to the other. This works for a single element, but I want to vectorize it. I have tried

Struct1(i:i+n).parm1 = Struct2(k:k+n).parm1;

where i is the length of Struct1 and k and k+n are integers that lie within Struct2 length. However, I get the error "Insufficient outputs from right hand side to satisfy comma separated list expansion on left hand side. Missing [] are the most likely cause."

How do I make this kind of assignment without writing a for loop?

Answer 1

[per isakson]

Have you tried

    new_struct = cat( Struct1(i:i+n), Struct2(k:k+n) );

Are the fields in the same order? Try this

    [ Struct1(i:i+n).parm1 ] = [ Struct2(k:k+n).parm1 ];

[John Petersen]

Thanks! I needed to slightly modify your answer to include the dimension of concatenation in the cat() function, but that worked. I couldn't get the second option to work for me.

[per isakson]

Yes, I hesitated regarding row or column and forgot to comments on it.