Deleting a row y from a matrix

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Cantor Set
Cantor Set 2020-2-17
评论： JESUS DAVID ARIZA ROYETH 2020-2-17
If I have a matrix A and I want to delete all the rows, y, in A such that y=[1 2 3];
Ex:
A=[ 1 2 3; 4 5 6; 7 8 9; 1 2 3]; y=[1 2 3];
I want to remove all the y vectors from A so that I have:
A=[4 5 6; 7 8 9];

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回答（1 个）

JESUS DAVID ARIZA ROYETH
编辑：JESUS DAVID ARIZA ROYETH 2020-2-17
A(all(A==y,2),:)=[]
edit previous versions:
A(all(A==repmat(y,size(A,1),1),2),:)=[]
  6 个评论
显示 4更早的评论
Cantor Set
Cantor Set 2020-2-17
Error using ==
Matrix dimensions must agree.
JESUS DAVID ARIZA ROYETH
JESUS DAVID ARIZA ROYETH 2020-2-17
try now:
A=[ 1 2 3; 4 5 6; 7 8 9; 1 2 3]; y=[1 2 3];
A(all(A==repmat(y,size(A,1),1),2),:)=[]

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