Logical Indexing in Simulink
조회 수: 16 (최근 30일)
이전 댓글 표시
I need guidance using logical indexing in a MATLAB function block in simulink. I simply want to select rows from the A matrix based on which elements of colomn one of the matrix is greater than a certain number. For example, input_matrix = [2 1 3; 1 4 2; 4 1 6], i want to use logical indexing to select rows of input_matrix where colomn 1 element is greater or equal to 2.
In matlab this would work just fine like this:
C = input_matrix(:,1) >= 2; %logical indexing of first colomn
output_matrix = input_matrix(C,:);
And output_matrix would be [2 1 3; 4 1 6];
However i get a variable size error when i put this in a MATLAB function block in simulink.
Thanks for your help.
댓글 수: 0
채택된 답변
Chaitanya Mallela
2020년 12월 24일
Hi Femi,
The output_matrix must be declared variable size while using this logical indexing in a MATLAB function block. When you double click MATLAB function block in Simulink, it opens MATLAB editor. On this editor tab, click edit data option thats edits data properties and manages ports. For the output_matrix, check the variable size checkbox and specify an explicit size in the size column (eg: [3,3]).
댓글 수: 3
Chaitanya Mallela
2020년 12월 24일
It is not necessary to specify exact dimensions, you can specify a numerical upperbound on the size to make Simulink realize a variable sized array.
Refer the documentation that demonstrates variable size declarations
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Sources에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!