Filter a matrix of data

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Atique Malik
Atique Malik 2020-3-4
评论： Atique Malik 2020-3-4
I have a data matrix, 2 columns and N rows. Lets call the columns x and y. I want all rows that meet teh following condition (X<25 and Y>30) to be nulled out of the original matrix and stored in a new matrix.

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Rik
Rik 2020-3-4
Just use logical indexing:
N=100;data=randi(100,N,2)/2;%generate random data
L=data(:,1)<25 & data(:,2)>30;
newdata=data(L,:);
data(L,:)=[];

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