Thread Subject: how to rename a workspace variable in a loop?

Hi,

I was wondering how you could rename a workspace variable in a loop? What I have is a loop that generates results which are stored in a matrix. the problem is that in the 2nd loop the matrix is overwritten. I also cannot add both matrices, because they are not of the same size.

Therefore i wanted to know how to rename the workspace variable for each loop generation. for example when using a "for" loop with i=1:1:5 how can I name the matrix M for each loop with a increment, thus M1, M2, M3, etc... so that I can analyze all the data and not that of only the last loop.

any suggestions are appreciated.

thank you

Use the EVAL function

Type:

   doc eval

at the command prompt.


For example:

  for i = 1:5

     ...
     ...

     eval([ 'M' num2str(k) ' = M;' ]);

     ...
     ...

  end




"Nizar " <pakoeli@hotmail.com> wrote in message
news:f7olca$1mj$1@fred.mathworks.com...
> Hi,
>
> I was wondering how you could rename a workspace variable in a loop? What
> I have is a loop that generates results which are stored in a matrix. the
> problem is that in the 2nd loop the matrix is overwritten. I also cannot
> add both matrices, because they are not of the same size.
>
> Therefore i wanted to know how to rename the workspace variable for each
> loop generation. for example when using a "for" loop with i=1:1:5 how can
> I name the matrix M for each loop with a increment, thus M1, M2, M3,
> etc... so that I can analyze all the data and not that of only the last
> loop.
>
> any suggestions are appreciated.
>
> thank you

Sorry, make that:

    eval([ 'M' num2str(i) ' = M;' ]);




"Rick Rosson" <rrosson@mathworks.com> wrote in message
news:f7oloa$75a$1@fred.mathworks.com...
> Use the EVAL function
>
> Type:
>
> doc eval
>
> at the command prompt.
>
>
> For example:
>
> for i = 1:5
>
> ...
> ...
>
> eval([ 'M' num2str(k) ' = M;' ]);
>
> ...
> ...
>
> end
>
>
>
>
> "Nizar " <pakoeli@hotmail.com> wrote in message
> news:f7olca$1mj$1@fred.mathworks.com...
>> Hi,
>>
>> I was wondering how you could rename a workspace variable in a loop? What
>> I have is a loop that generates results which are stored in a matrix. the
>> problem is that in the 2nd loop the matrix is overwritten. I also cannot
>> add both matrices, because they are not of the same size.
>>
>> Therefore i wanted to know how to rename the workspace variable for each
>> loop generation. for example when using a "for" loop with i=1:1:5 how can
>> I name the matrix M for each loop with a increment, thus M1, M2, M3,
>> etc... so that I can analyze all the data and not that of only the last
>> loop.
>>
>> any suggestions are appreciated.
>>
>> thank you
>
>

"Nizar " <pakoeli@hotmail.com> wrote in message <f7olca$1mj$1@fred.mathworks.com>...
> Hi,
>
> I was wondering how you could rename a workspace variable in a loop? What I have is a loop that generates results which are stored in a matrix. the problem is that in the 2nd loop the matrix is overwritten. I also cannot add both matrices, because they are not of the same size.
>
> Therefore i wanted to know how to rename the workspace variable for each loop generation. for example when using a "for" loop with i=1:1:5 how can I name the matrix M for each loop with a increment, thus M1, M2, M3, etc... so that I can analyze all the data and not that of only the last loop.

Don't. See question 4.6 in the newsgroup FAQ for some of the reasons you shouldn't do this and alternatives to doing this.

http://matlabwiki.mathworks.com/MATLAB_FAQ

--
Steve Lord
slord@mathworks.com