how to delete the rest of the zeros from a matrix

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wasima tammi 2015-3-6

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评论： Sad Grad Student 2015-3-24

suppose this the output c=[0 0 0 0; 0 0 0 0; 1 1 1 1] now how could i delete the other zeros for a looop and only print the last row??

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Adam 2015-3-6

Is that as complex as the problem gets or do you have case where some 1s appear in a row with 0s? If so are you expecting the output to simply be a 1d array of basically however many 1s exist in c, irrespective of the structure of where they appear?

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Answer 1

Sad Grad Student 2015-3-6

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https://ww2.mathworks.cn/matlabcentral/answers/181903-how-to-delete-the-rest-of-the-zeros-from-a-matrix#answer_170367

编辑：Sad Grad Student 2015-3-6

在 MATLAB Online 中打开

To remove 0, you can simply do: c(~c) = []; you don't need a loop! Beauty of matlab :)

~c is essentially looking for empty values in c. In Matlab, 0 means empty value and you can simply remove it by replacing it with []

>> c=[0 0 0 0; 0 0 0 0; 1 1 1 1]

c =

   0     0     0
   0     0     0
   1     1     1

>> c(~c) = []

c =

1 1 1 1

>>

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wasima tammi 2015-3-7

when i m doing this all columns are not showing i have 41 columns and 10 rows but i dont know why this happening here only shows 13 or 14 columns??? but why??

Sad Grad Student 2015-3-24

I need to know what exactly it is that you're doing. Post your code here in the comments so I can answer why you're getting unexpected number of columns.

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