Thread Subject: cols rows command

I just upgraded from 2009a (7.8) to 2009b (7.9), and I ran a simple code to see if upgrade works fine. I have an error for a simple command like rows(x) and cols(x), where x is (nxk) matrix. These commands work fine with 2009a version, but now I have an error saying

"??? Undefined function or method 'rows' for input arguments of type 'double'."

I know that I can obtain the same results using 'size(x)', but I have so many programs written using 'cols' or 'rows'.

I have database toolbox in both versions. Any idea why this happens? Thanks.

B.J.

"Byung-Joo " <bjleend@hotmail.com> wrote in message <h9dudh$75t$1@fred.mathworks.com>...
> I just upgraded from 2009a (7.8) to 2009b (7.9), and I ran a simple code to see if upgrade works fine. I have an error for a simple command like rows(x) and cols(x), where x is (nxk) matrix. These commands work fine with 2009a version, but now I have an error saying
>
> "??? Undefined function or method 'rows' for input arguments of type 'double'."
>
> I know that I can obtain the same results using 'size(x)', but I have so many programs written using 'cols' or 'rows'.
>
> I have database toolbox in both versions. Any idea why this happens? Thanks.
>
> B.J.

Are you sure this was a default Matlab function? I checked 2007a, and there are no functions rows or cols (and I do not have the database toolbox either). Maybe they were custom defined functions. Start 2009a and type:
>> which rows
and check the location of the file.

If you are really dependent on it, and are unwilling to change all your code, make custom functions:
function n = cols(x)
n = size(x, 2);

function n = rows(x)
n = size(x, 1);

If you are running Linux, maybe somebody can help you with a magic regexp that changes all references automatically for you.

Sebastiaan,

Thanks for your quick reply.

Yes, rows and cols are NOT Matlab defaut functions. They are database toolbox command. But, they worked fine with 2009a, but not with 2009b even though I have database toolbox in both versions. I don't know what's wrong here. BTW, I am using WinXP (32bit) version.

Thanks anyway.

B.J.

"Sebastiaan " <s.breedveld@erasmusmc.REMOVE.BOO.BOO.nl> wrote in message <h9dv5m$qnc$1@fred.mathworks.com>...
> "Byung-Joo " <bjleend@hotmail.com> wrote in message <h9dudh$75t$1@fred.mathworks.com>...
> > I just upgraded from 2009a (7.8) to 2009b (7.9), and I ran a simple code to see if upgrade works fine. I have an error for a simple command like rows(x) and cols(x), where x is (nxk) matrix. These commands work fine with 2009a version, but now I have an error saying
> >
> > "??? Undefined function or method 'rows' for input arguments of type 'double'."
> >
> > I know that I can obtain the same results using 'size(x)', but I have so many programs written using 'cols' or 'rows'.
> >
> > I have database toolbox in both versions. Any idea why this happens? Thanks.
> >
> > B.J.
>
> Are you sure this was a default Matlab function? I checked 2007a, and there are no functions rows or cols (and I do not have the database toolbox either). Maybe they were custom defined functions. Start 2009a and type:
> >> which rows
> and check the location of the file.
>
> If you are really dependent on it, and are unwilling to change all your code, make custom functions:
> function n = cols(x)
> n = size(x, 2);
>
> function n = rows(x)
> n = size(x, 1);
>
> If you are running Linux, maybe somebody can help you with a magic regexp that changes all references automatically for you.

Byung-Joo wrote:
...
> Yes, rows and cols are NOT Matlab defaut functions. They are database
> toolbox command. But, they worked fine with 2009a, but not with 2009b
> even though I have database toolbox in both versions. I don't know
> what's wrong here. ...

Looks like time to check current version documentation and if no
satisfaction TMW official support.

--

As suggested . .

make one file with
> function n = cols(x)
> n = size(x, 2);


make another with
> function n = rows(x)
> n = size(x, 1);


Put them in a folder and add that folder to your path. Done.

:)

Thanks, Nick and Sebastiaan

As it turned out, they (and many other econometrics related functions) are customized functions which I added in 2009a version, but I forgot to add that folder when I upgraded to 2009b. They are working now. Thanks.

B.J.

"Nick Clark" <bmoviehorror@hotmail.com> wrote in message <h9e1aj$kcp$1@fred.mathworks.com>...
> As suggested . .
>
> make one file with
> > function n = cols(x)
> > n = size(x, 2);
>
>
> make another with
> > function n = rows(x)
> > n = size(x, 1);
>
>
> Put them in a folder and add that folder to your path. Done.
>
> :)