Create a matrix with only the rows indexed by a multiple of N of another matrix.

1 次查看(过去 30 天)
Hello everyone!
And I am trying to create a matrix, containing only the rows indexed by (1+3x) of a given matrix. In other words, the first row and then jump every 3 rows until the end of the original matrix
Concretely, I have something that looks like this:
x1 = randi([0, 10], [9,2])
x1 =
5 10
4 6
4 5
2 1
1 1
4 8
9 8
3 5
6 6
And I am trying to get this:
x2 =
5 10
2 1
9 8
Is there any straightforward way to do this?
Thanks!

采纳的回答

David Hill
David Hill 2020-5-4
x2=x1(1:3:length(x1),:);

更多回答(1 个)

Prasad Reddy
Prasad Reddy 2020-5-4
clc
clear all
x1=randi([0,10],[9,2])
x2=[]
for i=1:3:length(x1)
x2=[x2; x1(i,:)]
end
% this will work

类别

Help CenterFile Exchange 中查找有关 Matrix Indexing 的更多信息

产品


版本

R2018b

Community Treasure Hunt

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

Start Hunting!

Translated by