How to create matrix from struct

Question

I have a structure PI{1x50cell} with fields x, y, z, xy, t, des.

x, y, z, xy, t are doubles. However, des is a 1x640 vector.

I would like to have this mapped on a two matrix, the first one will be 50x5 and the second one will be 50x640.

How to do it? Thank you in advance.

Your question is unclear. Do you have a 1x50 cell-array, and each cell contains a single struct? — Eitan T, Jun 17 '13 at 18:37
yes PI is 1x50 cell-array and each cell conatins a single struct where there is the fields x, y, z, xy, t, des. — Ren, Jun 17 '13 at 18:43
May I ask why aren't you using an [array of structures](http://blogs.mathworks.com/loren/2006/11/24/working-with-arrays-of-structures/) instead? — Eitan T, Jun 17 '13 at 18:44
you might also find this useful: http://stackoverflow.com/a/4169216/97160 — Amro, Jun 17 '13 at 19:17

score 1 · Answer 1 · answered Jun 17 '13 at 19:15

Here is an example:

%# sample 1x50 cellarray, each element is a struct
PI = repmat({struct('x',1,'y',2,'z',3,'xy',4,'t',5,'des',rand(1,640))}, [1,50]);

%# create an array of structs
C = [PI{:}];

%# extract fields and build M1 a 50x5 matrix, and M2 a 50x640 matrix
M1 = [vertcat(C.x) vertcat(C.y) vertcat(C.z) vertcat(C.xy) vertcat(C.t)];
M2 = vertcat(C.des);

How to create matrix from struct

1 Answers1