Delete specific rows from a matrix
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Hi all,
i want to delete rows which with the values 1 in their columns, how can i do it ?
For example:
A= [7,7;2,2;1,1;3,3]
Becomes
A=[7,7;2,2;3,3]
Thank you !
P.s I've searched other posts before posting this .. couldn't find any help
采纳的回答
Joseph Cheng
2014-8-18
编辑：Joseph Cheng
2014-8-18
the use of the function any() can find where there are any numbers equal to one.
A= [7,7;2,2;1,1;3,3]
A(any(A==1,2),:)=[]
by using the dimension modifier in the any() function, i can return which rows or columns contain the logical 1 which is when A ==1.
2 个评论
Ron
2014-8-18
Joseph Cheng
2014-8-18
oh.. sorry meetings all day. the two is the dimension modifier. if you check the help for the any ('>>help any') the 2 stands for rows and 1 stands for columns. similar to the sum() function where you can sum a matrix in the row or column directions based on the dimension parameter.
更多回答（1 个）
Honglei Chen
2014-8-18
编辑：Honglei Chen
2014-8-18
A(any(A==1,2),:) = []
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