Function with mat-file and return struct array

I have two questions about an assignment that I'm working on.

How do I specify that in my mat-files I only want the two first fields (Name and Size) in structure array? and not bytes, class sparse etc.

How do I make sure the number of elements in the structure array corresponds to the number of the variables in the mat-file?

This is what I've done, am I doing it right. It might be right before my eyes but I'm quite new to Matlab.

x = magic(20); % 20x20 array
y= magic(15);
z= magic(10);
save('A.mat','x');  %binary matfile
save('B.mat','y');
save('C.mat','z');
% whos('-.mat'); % info
e=whos('B.mat')

a=load('A.mat');
b=load('B.mat');
c=load('C.mat');

Asize = size(a.x);
Bsize = size(b.y);
Csize = size(c.z);

struct('Name',a,'Size',Asize);

Answer 1

[atharva]

Hey Bertil,

I understand that you only want the two first fields "Name and Size" in structure array and not bytes, class sparse etc.

You can try the following code which outputs 1 x 3 struct array with fields : Name and Size

x = magic(20); % 20x20 array
y = magic(15);
z = magic(10);

save('A.mat', 'x');  % binary matfile
save('B.mat', 'y');
save('C.mat', 'z');

a = load('A.mat');
b = load('B.mat');
c = load('C.mat');

Asize = size(a.x);
Bsize = size(b.y);
Csize = size(c.z);

% Create a structure array with 'Name' and 'Size' fields
dataStruct = struct('Name', {'A', 'B', 'C'}, 'Size', {Asize, Bsize, Csize});

% Display the structure array
disp(dataStruct);

I hope this helps!