remove the rows of matrix?

2 次查看（过去 30 天）
jack nn
jack nn 2015-4-1
评论： jack nn 2015-4-1
I want to remove the rows of matrix that the value of them in first column is zero...I use this code:
if true
for i=1:7
if m(i)==0
m(i,:)=[];
i=i-1;
end
end
end
I run this code for this matrix but the answer is not true,it could not remove all rows that the first column of them is zero..
if true
>> m=[1 2;3 4;0 5;3 0;0 4;0 54;3 22]
m =
1 2
3 4
0 5
3 0
0 4
0 54
3 22
if true
>> for i=1:7
if m(i)==0
m(i,:)=[];
i=i-1;
end
end
end
but when we saw the result,the result is: >> m
m =
1 2
3 4
3 0
0 54
3 22
end
is my cod wrong?

请先登录，再回答此问题。

采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2015-4-1
编辑：Azzi Abdelmalek 2015-4-1
m=[1 2;3 4;0 5;3 0;0 4;0 54;3 22]
m(~m(:,1),:)=[]

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Resizing and Reshaping Matrices 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