[CM] newbie question: graph
Heinrich Taube
taube at uiuc.edu
Tue Nov 23 05:47:00 PST 2010
> can somebody translate me this from 2.3.4-lisp to 3.7.0 cm-scheme?
> (Just
(define x (make-graph `((a ,(make-weighting '(2 3)) 1)
(b ,(make-cycle '(1 3)) 2)
(c 1 3))
:for 20))
(next x #t)
-> (a c a b a b c a b a b c a c a b a c a c)
make-graph returns a graph pattern. graphs contain nodes, each node in
a graph has an item
to return , a rule to move to the next node from that node, and a
unique node identifier (id)
in the graph. rules return id's not items.
(<item> <rule> <id>)
when you specify a node i would recommend that you always provide all
three values
> give me some non-trivial graph-examples in Scheme? Just as a starting
> point. I did not found any in the docs.
patterns are defined in cm.html, including graphs. select 'make-graph'
with your mouse and hit COMMAND-D (Control-D on linux or win32)
there are lots of examples of patterns including graphs in :
Help>Examples>Sal>Patterns 1 and Help>Examples>Sale>Patterns 2
if you already know Lisp then its trivial to read these examples in
sal. additionally you can take a sal expression and convert it to
scheme using the Eval>Expand
On Nov 23, 2010, at 2:35 AM, Michael Winkler wrote:
> (setf x (new graph
> (a to (new random b c))
> (b to (new cycle a c))
> (c to a) for 20))
> (next x t)
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