On 13 February 2012 14:38, Doug Stewart <
address@hidden> wrote:
>
>
> 2012/2/13 Carnë Draug <
address@hidden>
>>
>> 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
>
>
> So the help is:
>> help @lti/c2d
> address@hidden/c2d' is a function from the file
> /home/doug/octave/control-2.2.4/@lti/c2d.m
>
> -- Function File: SYS = c2d (SYS, TSAM)
> -- Function File: SYS = c2d (SYS, TSAM, METHOD)
> -- Function File: SYS = c2d (SYS, TSAM, "PREWARP", W0)
> Convert the continuous lti model into its discrete-time equivalent.
> is this wrong?
> Doug