MATLAB Answers

antonet

converting specific string variables to double

Asked by antonet
on 15 Jun 2013

Dear all,

I have the following matrix

 A={'name'
   'afsaf'
   'sfsfs'
   '0'
 'rpytui'
'0'
'0'
'0'
'dfgl'
'trd'
};

I want to convert the zeros which are string variables to numeric variables; that is

 A={'name'
   'afsaf'
   'sfsfs'
   [0]
 'rpytui'
[0]
[0]
[0]
'dfgl'
'trd'
};

Is there a way of doing that?

Thanks in advance!

  0 Comments

Tags

Products

No products are associated with this question.

4 Answers

Answer by the cyclist
on 15 Jun 2013
 Accepted answer

I knew there was an easier way:

A(ismember(A,'0'))={0}

  1 Comment

Azzi Abdelmalek
on 15 Jun 2013

This one is much faster


Answer by Jan Simon
on 17 Jun 2013
A(strcmp(A, '0')) = {0}

  1 Comment

Azzi Abdelmalek
on 17 Jun 2013

This is faster

A=repmat(A,100000,1);
tic
A(ismember(A,'0'))={0};
toc
tic
A(strcmp(A, '0')) = {0};
toc
Elapsed time is 0.047910 seconds.
Elapsed time is 0.012593 seconds.

Answer by the cyclist
on 15 Jun 2013

I am quite sure there is a simpler way, but one way is

A(cellfun(@(x)isequal(x,'0'),A))={0};

  0 Comments


Answer by Azzi Abdelmalek
on 15 Jun 2013
Edited by Azzi Abdelmalek
on 15 Jun 2013
A(~cellfun('isempty',strfind(A,'0')))={0}

  0 Comments


Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply today