How to delete a zeros in matrix?

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Matlab111
Matlab111 2015-2-7
评论： Matlab111 2015-2-8
I have a matrix like this
a=[ 0.7446 0.0364 186.1153 0 134.5022 114.8212 84.7745 130.8661
0 0 13.8840 0 16.1683 10.4461 69.8035 114.2774];
i want to delete zeros and their corresponding values. The solution should be like this...
b= [186.1153 134.5022 114.8212 84.7745 130.8661
13.8840 16.1683 10.4461 69.8035 114.2774];

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采纳的回答

Image Analyst
Image Analyst 2015-2-7
This will get rid of all columns that have a zero anywhere in them:
colsWithZeros = any(a==0)
b = a(:, ~colsWithZeros)
  2 个评论
Jan
Jan 2015-2-7
If a gets a matrix with a single row unexpectedly, this will fail. Better specify the dimension to operate on explicitly:
colsWithZeros = any(a==0, 1)
Matlab's smart guess to operate on the first non-singelton dimension is a keen source of many bugs.

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更多回答（2 个）

Jason Moore
Jason Moore 2015-2-7
编辑：Jason Moore 2015-2-7
I think this question was already asked before but this code should do it.
b = a(find(a~=0))
ulgi onor
ulgi onor 2015-2-7
a(a==0)=[]
a =
Columns 1 through 9 0.7446 0.0364 186.1153 13.8840 134.5022 16.1683 114.8212 10.4461 84.7745 Columns 10 through 12 69.8035 130.8661 114.2774
  2 个评论
David Young
David Young 2015-2-7
I think that what's wanted is a 2-row matrix with the relevant columns deleted.
This answer doesn't deliver that - it shares the same problem as Jason Moore's.
David Young
David Young 2015-2-7
Also note that your result has different elements to the matrix b in the question.

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