help with bwmorph on OS X

[Justin MacCarthy]

I just downloaded octave , so be gentle. OS X binary.

I have a *.m script that uses the  bwmorph function
When I try to use that function ...

octave-3.2.3:17> help bwmorph
error: help: `bwmorph' not found
octave-3.2.3:17> bwmorph
error: `bwmorph' undefined near line 17 column 1
octave-3.2.3:17> bwmorph()
error: `bwmorph' undefined near line 17 column 1
octave-3.2.3:17> help bwmorph
error: help: `bwmorph' not found
octave-3.2.3:19> x = bwmorph('my.jpg')
error: `bwmorph' undefined near line 19 column 5
octave-3.2.3:19> x = bwmorph('my.jpg','thin',3)
error: `bwmorph' undefined near line 19 column 5


Any ideas ????
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[Søren Hauberg]

Hi,

søn, 25 10 2009 kl. 21:56 +0700, skrev Justin MacCarthy:
> octave-3.2.3:17> help bwmorph
> error: help: `bwmorph' not found

All the error messages tell you the same: you do not have the 'bwmorph'
function. This function is part of the 'image' package. Do you have that
package installed? You can tell which packages you have installed by
typing

  pkg list

at the Octave prompt.

Søren

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[Justin MacCarthy]

I've installed the image package (On Mac OSX ) and got a few warnings...

octave-3.2.3:5> pkg install image-1.0.10.tar.gz
In file included from
/Applications/Octave.app/Contents/Resources/include/jpeglib.h:24,
                 from jpgwrite.cc:18:
/Applications/Octave.app/Contents/Resources/include/jconfig.h:12:1:
warning: "HAVE_STDLIB_H" redefined
In file included from
/Applications/Octave.app/Contents/Resources/include/octave-3.2.3/octave/oct.h:31,
                 from jpgwrite.cc:11:
/Applications/Octave.app/Contents/Resources/include/octave-3.2.3/octave/config.h:699:1:
warning: this is the location of the previous definition
In file included from
/Applications/Octave.app/Contents/Resources/include/jpeglib.h:24,
                 from jpgread.cc:49:
/Applications/Octave.app/Contents/Resources/include/jconfig.h:12:1:
warning: "HAVE_STDLIB_H" redefined
In file included from
/Applications/Octave.app/Contents/Resources/include/octave-3.2.3/octave/oct.h:31,
                 from jpgread.cc:41:
/Applications/Octave.app/Contents/Resources/include/octave-3.2.3/octave/config.h:699:1:
warning: this is the location of the previous definition

also when I go to use bwmorph I'm getting another error

octave-3.2.3:6>

error: `swap' undefined near line 550 column 10
error: called from:
error:   /Users/macarthy/octave/image-1.0.10/bwmorph.m at line 550, column 9
error:   /Users/macarthy/octave/myscript.m at line 17, column 12
octave-3.2.3:6>

do I need to add another package for that swap function ?

Is there a why to find out what package adds what function?
Thanks

Justin

2009/10/25 Søren Hauberg <soren@...>:

> Hi,
>
> søn, 25 10 2009 kl. 21:56 +0700, skrev Justin MacCarthy:
>> octave-3.2.3:17> help bwmorph
>> error: help: `bwmorph' not found
>
> All the error messages tell you the same: you do not have the 'bwmorph'
> function. This function is part of the 'image' package. Do you have that
> package installed? You can tell which packages you have installed by
> typing
>
>  pkg list
>
> at the Octave prompt.
>
> Søren
>
>

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[Søren Hauberg]

man, 26 10 2009 kl. 11:19 +0700, skrev Justin MacCarthy:

> octave-3.2.3:5> pkg install image-1.0.10.tar.gz
> In file included from
> /Applications/Octave.app/Contents/Resources/include/jpeglib.h:24,
>                  from jpgwrite.cc:18:
> /Applications/Octave.app/Contents/Resources/include/jconfig.h:12:1:
> warning: "HAVE_STDLIB_H" redefined
> In file included from
> /Applications/Octave.app/Contents/Resources/include/octave-3.2.3/octave/oct.h:31,
>                  from jpgwrite.cc:11:
> /Applications/Octave.app/Contents/Resources/include/octave-3.2.3/octave/config.h:699:1:
> warning: this is the location of the previous definition
> In file included from
> /Applications/Octave.app/Contents/Resources/include/jpeglib.h:24,
>                  from jpgread.cc:49:
> /Applications/Octave.app/Contents/Resources/include/jconfig.h:12:1:
> warning: "HAVE_STDLIB_H" redefined
> In file included from
> /Applications/Octave.app/Contents/Resources/include/octave-3.2.3/octave/oct.h:31,
>                  from jpgread.cc:41:
> /Applications/Octave.app/Contents/Resources/include/octave-3.2.3/octave/config.h:699:1:
> warning: this is the location of the previous definition

I guess these warnings are okay to ignore, although it would be nice to
get rid of them.

> also when I go to use bwmorph I'm getting another error
>
> octave-3.2.3:6>
>
> error: `swap' undefined near line 550 column 10
> error: called from:
> error:   /Users/macarthy/octave/image-1.0.10/bwmorph.m at line 550, column 9
> error:   /Users/macarthy/octave/myscript.m at line 17, column 12
> octave-3.2.3:6>
>
> do I need to add another package for that swap function ?

No, this seems to be a bug in the 'bwmorph' function. I've uploaded a
fix to SVN, so this will be corrected in the next version of the 'image'
package. Until this is released, you can create a function with the
following contents somewhere in your path

  function [a, b] = swap (b, a)
  endfunction

> Is there a why to find out what package adds what function?

You can go to

  http://octave.sourceforge.net/doc/index.html

and browse the function names alphabetically. After each function name
you'll see a package name. For instance, after 'edge' on

  http://octave.sourceforge.net/doc/E.html#E

you'll see '[image]' which informs you that the 'edge' function is in
the 'image' package.

Søren

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