deleting selective multiple rows from a data matrix

3 次查看（过去 30 天）
Rabeya
Rabeya 2012-4-10
I want to delete rows of a matrix depending on some specific values of one of its columns. Say, if A=[1,2,3,1;5,6,7,2;9,10,11,3;13,14,15,4]; B=A(:,4);
I want to delete rows of A if B<2 and B>3, that is want the second and third rows of A.
I have tried A(B,:)=[] type commands, but failed.

请先登录，再回答此问题。

采纳的回答

Thomas
Thomas 2012-4-10
A(~(B<2|B>3),:)

更多回答（1 个）

Leah
Leah 2012-4-10
couple of problems
B<2 & B>3
is always false you need to use a logical index to filter rows of A, B is not logical (all zeros and ones) these commands would work
A(B==2 | B==3,:)
A([2 3],:)
A(logical([0 1 1 0 ]),:)

类别

在 Help Center 和 File Exchange 中查找有关 Resizing and Reshaping Matrices 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by