How to extend an array to a new dimension?

조회 수: 30 (최근 30일)
Sufayan Mulani
Sufayan Mulani 2023년 8월 29일
답변: Star Strider 2023년 8월 29일
Suppose, I have an array
a=rand(3, 4);
I want to create a new array 'b' which has [ 3, 4, 5] size, and all 2D matrix along the third dimension are equal to 'a'.
b = zeros([size(a) 5]);
for i=1:5
b(:, :, i) = a;
end
How can I do this using MATLAB functions.

이 질문에 답변하려면 로그인하십시오.

채택된 답변

Star Strider
Star Strider 2023년 8월 29일
Ran in:
One option is the repmat function —
a=rand(3, 4);
b = zeros([size(a) 5]);
for i=1:5
b(:, :, i) = a;
end
b
b =
b(:,:,1) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327 b(:,:,2) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327 b(:,:,3) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327 b(:,:,4) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327 b(:,:,5) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327
b2 = repmat(a, 1, 1, 5)
b2 =
b2(:,:,1) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327 b2(:,:,2) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327 b2(:,:,3) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327 b2(:,:,4) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327 b2(:,:,5) = 0.2207 0.2683 0.7580 0.4175 0.6446 0.7519 0.0339 0.4267 0.9818 0.8499 0.6944 0.9327
Both results are the same.
.

추가 답변 (0개)

카테고리

Help Center 및 File Exchange에서 Resizing and Reshaping Matrices에 대해 자세히 알아보기

태그

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by