Re: list???

[A. Scottedward Hodel]

----------
>From: Daniel Heiserer <address@hidden>
>To: "address@hidden" <address@hidden>
>Subject: list???
>Date: Wed, Jun 16, 1999, 9:27 AM
>

>Hi,
>I downloaded 2.0.14 and installed it.
>
>I can remember that someone mentioned that the data-type "list"
>should be available there. Is that right?
>How does that work?
>I didn't find anything in the online Manual "Edition 3 for Octave
>version 2.0.10
>February 1997"
>http://www.che.wisc.edu/octave/doc/octave_toc.html
>and also not in the release notes....
>
>Bye daniel
>
>-- 
>Mit freundlichen Gruessen
>                                 Daniel Heiserer


The list data type currently is in only the bleeding-edge (2.1.14) 
release.  It behaves like the matlab 5.0 "cell" structure, except that
a list is only one dimensional, whereas the matlab cell structure is not
restricted to be one dimensional.

Functions:
    list(): create a list
    append(): append items to a list, or concatenate two lists.
    nth(): return nth element of a list.
List elements can be of any type, e.g., l1 is a list, joe is a structure,
and woof is a string matrix:

octave> ll = list(l1,joe,woof)
ll =
(
  [1] =
  (
    [1] = 1
    [2] = 2
    [3] = 3
  )
  [2] =
  {
    x = 1
    y = 2
  }
  [3] =

life
the universe
and everything

)

Subscript operations on lists return lists:
octav> item_2_list = ll(2)
item_2_list =
(
  [1] =
  {
    x = 1
    y = 2
  }
) 

The nth function returns the item itself:
       octave:13> item_2_value = nth(ll,2)
item_2_value =
{
  x = 1
  y = 2
}

Further examples are in the Octave controls toolbox, particularly
functions dre (differential riccati equation), sysgetsignals, and
syssetsignals.

A S Hodel Assoc. Prof. Dept Elect Eng, Auburn Univ,AL  36849-5201
On leave at NASA Marshall Space Flight Center (256) 544-1426
Address until 15 Mar 2000:Mail Code TD-55, MSFC, Alabama, 35812
http://www.eng.auburn.edu/~scotte



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