Easiest Way to Assign Graphics Objects to a 1-by-n Struct?

How to assign graphics objects to a 1-by-5 struct field? Is there an easier way than using a for loop and assign the values elementwise?

When there is more than one row, it works perfectly and I get 10 rectangles:

Rectangles1(2, 5).r = rectangle();

But when I run the code below with only one row, MATLAB only creates one rectangle, instead of 5 rectangles?

Rectangles2(1, 5).r = rectangle();

[Walter Roberson]

No,

Rectangles1(2, 5).r = rectangle();

only assigns 1 rectangle, to element (2,5) . The "r" fields for the other structure members will be empty.

[Adam]

A for loop seems like the best way. rectangle does not support vectorised creation and if you try to get fancy with something like:

[ Rectangles2(1, 1:5).r ] = deal( rectangle() );

you get a rectangle in each of your structs, but it is a reference to the same rectangle in all of them which I assume is not what you want.

To create 5 distinct rectangles you will need 5 calls to rectangle( ) by some method or other.

Answer 1

[Walter Roberson]

template = ones(2,5);     %shape matters, content does not
Rectangles2 = cell2mat( arrayfun( @(r) struct('r', rectangle()), template, 'Uniform', 0) );

This will, however, overwrite the entire contents of Rectangles2

[Rightia Rollmann]

Thank you!

What does

'Uniform', 0

do?

[Adam]

Try it without and you'll get an error message telling you. Basically it means a regular array of whatever the output is is not supported by arrayfun though so you need the 'catch-all' option of dumping the outputs into a cell array.