Define a new structure from another one

Hi,

I have structure (STR) as struct 20x1 with two fields (A and B).

I want:

1- to call STR in a function,

2- and I want to define a new structure with a new name for example SS.P in which, it is equal to STR.A.

I know that I can use "SS.P=STR.A", but in this case, I don't want to use "A".

I'm looking for some thing like: SS.P =STR(:,1) and in this statement, 1 is the first column (field) of STR. Unfortunetely, the commend of SS.P =STR(:,1) is not a correct comment in MATLAB. Could anyone give me the right comment to do this?

[KSSV]

This means you want to convert structure to array?

Try struct2cell.

[civil tech]

No.

A new struct having the first filed of STR with all of the 20 rows.

[civil tech]

The problem here is that the name of A is changed in each calling of the function. So, I can't use "SS.P=STR.A".

[civil tech]

Consider this:

STR : struct 25x1

fields A B

1 1X10 1X1

2 1X10 1X1

3 1X10 1X1

How I can define a new structure S (having only one field P) including the first column of STR (column A) and all rows (1,...,3), without using the name of A? without using the code of S.P=STR.A

Answer 1

[Bruno Luong]

fname = fieldnames(STR)
S.P = STR.(fname{1}); % S = struct('P', {STR.(fname{1})})

[civil tech]

Many thanks