Removing elements from matrix
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Marin
am 14 Mai 2012
Kommentiert: Julia
am 5 Aug. 2014
Hi everyone,
I was wonderning is there an easy way to remove some of the elemetts from matrix. I have a data array data(300x2) and I want to remove all rows that have the value in the second column smaller than 0.18.
I tried something like
data=data(data(:,2)<0.18);
and similar combinations but it doesn't work.
Thank you in advance for any advice you can offer.
2 Kommentare
harsha
am 5 Aug. 2014
hi
i have a 49x49 matrix and i want to delete the single element at center of the matrix.how can i do so?please help.
Julia
am 5 Aug. 2014
What do you mean with delete? Set to 0? You can delete the row or the column containing the element, but you cannot create a hole in the middle of the matrix.
Akzeptierte Antwort
Andrei Bobrov
am 14 Mai 2012
data=data(data(:,2)>=0.18,:);
ADDED after Marin's comment
simple example
data1 =[...
2 3
5 8
10 3
4 6
6 7]
data2 =[...
9 2
10 2
6 3]
data1(ismember(data1(:),data2(:))) = nan
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