index and matrix selection

1 次查看（过去 30 天）
Rica
Rica 2012-11-12
Hi,
my index matrixis size(index)=118*4. the data matrix is size(data)=2970290*9
iwa nt to select just index-data.
i wrote this:
data_new=data([index],:). the size of this matrix is:472*9.
I want to get the matrix with the size 118*36. I dont want to use reshape. do you know something better than my statement (data_new=data([index],:))
Thanks

请先登录，再回答此问题。

采纳的回答

José-Luis
José-Luis 2012-11-12
cell2mat(arrayfun(@(x) {data(x,:)},index,'uniformoutput',false));
Using reshape should be faster though.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by