Easiest Way to Assign Graphics Objects to a 1-by-n Struct?
조회 수: 1 (최근 30일)
이전 댓글 표시
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();
댓글 수: 2
Walter Roberson
2017년 3월 6일
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
2017년 3월 6일
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.
채택된 답변
Walter Roberson
2017년 3월 6일
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
댓글 수: 2
Adam
2017년 3월 6일
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.
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Structures에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!