Re: control pkg

[Carnë Draug]

On 13 February 2012 14:07, Doug Stewart <address@hidden> wrote:
> I have
>
> octave:1> ver
> ----------------------------------------------------------------------
> GNU Octave Version 3.6.1-rc0
> GNU Octave License: GNU General Public License
> Operating System: Linux 2.6.32-38-generic #83-Ubuntu SMP Wed Jan 4 11:13:04
> UTC 2012 i686
> ----------------------------------------------------------------------
> Package Name   | Version | Installation directory
> ---------------+---------+-----------------------
>       control *|   2.2.4 | /home/doug/octave/control-2.2.4
> miscellaneous *|  1.0.11 | /home/doug/octave/miscellaneous-1.0.11
>         optim *|  1.0.17 | /home/doug/octave/optim-1.0.17
>        signal *|   1.1.2 | /home/doug/octave/signal-1.1.2
>       specfun *|   1.1.0 | /home/doug/octave/specfun-1.1.0
>        struct *|   1.0.9 | /home/doug/octave/struct-1.0.9
>
>
> i do:
>
> octave:2> help c2d
> error: help: `c2d' not found
>
> but
> octave:2> help tf
> `tf' is a function from the file /home/doug/octave/control-2.2.4/@tf/tf.m
>
>  -- Function File: S = tf ("S")
>  -- Function File: Z = tf ("Z", TSAM)
>  -- Function File: SYS = tf (SYS)
>  -- Function File: SYS = tf (N
>
>
> Why are some of the things in control pkg available and others are not?????
>
> Doug


This is explained in the manual here
http://www.gnu.org/software/octave/doc/interpreter/Creating-a-Class.html#Creating-a-Class

Note that methods of a class can be documented. The help for the
constructor itself can be obtained with the constructor name, that is
for the polynomial constructor help polynomial will return the help
string. Also the help can be obtained by restricting the search for
the help to a particular class, for example help
@polynomial/polynomial. This second method is the only means of
getting help for the overloaded methods and functions of the class.

The help text you are trying to access, is a function of the class so
you need to specify the class as in "help @lti/c2d".

Carnë