How to constructing a matrix of repeated rows v?
15 ビュー (過去 30 日間)
古いコメントを表示
If I have an arbitrary matrix A and a row vector v of 1 row and the same number of columns as A.
Suppose I want to construct a matrix Q of the same size as A where every row in Q is the vector v.
Illustrative example:
A=[ 1 1 1; 2 2 2; 3 3 3; 4 4 4]; v=[5 5 5];
%I want to create Q s.t
Q=[5 5 5; 5 5 5 5; 5 5 5 5; 5 5 5 5];
Thanks
0 件のコメント
採用された回答
Matt J
2020 年 3 月 7 日
編集済み: Matt J
2020 年 3 月 7 日
Either of the following would work
>> Q=repelem(v,size(A,1),1)
>> Q=repmat(v,size(A,1),1)
but note that it's not normally something you need or want to do. Matlab has deliberately provided implicit expansion,
or for older Matlab versions bsxfun,
to avoid such copying in many common situations.
0 件のコメント
その他の回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Matrices and Arrays についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!