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DirectedGraphLayout: Algorithm used [message #177283]

Wed, 13 April 2005 10:56

Eclipse User

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I use the DirectedGraphLayout (and am quite happy with it). I was
wondering if there was any description of the algorithm (or commonly used
name for it) other than reading the code and trying to figure out exactly
how it does what it does.

Thanks
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<br><font size=2 face="sans-serif">I use the DirectedGraphLayout (and am
quite happy with it). I was wondering if there was any description of the
algorithm (or commonly used name for it) other than reading the code and
trying to figure out exactly how it does what it does. </font>
<br>
<br><font size=2 face="sans-serif">Thanks</font>
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Re: DirectedGraphLayout: Algorithm used [message #177294 is a reply to message #177283]

Wed, 13 April 2005 11:02

Eclipse User

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and yes I know about the description in the help. I'm mainly wondering if
there's a name for it "in the literature"
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<br><font size=2 face="sans-serif">and yes I know about the description
in the help. I'm mainly wondering if there's a name for it "in the
literature"</font>
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Re: DirectedGraphLayout: Algorithm used [message #177300 is a reply to message #177294]

Wed, 13 April 2005 11:22

Eclipse User

Originally posted by: none.us.ibm.com

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We use a network simplex algorithm for assigning ranks. We also use =
this same algorithm for adjusting final x coordinates by creating an =
auxilary graph as described by Stephen North et al (A technique for =
directed graphs or something). The rank ordering is done using the =
tried but true approach of sweeping up and down the rows and assigning =
values to the nodes and sorting them (Sugiyama). We some modified =
barycenter method I think.

<gresh@us.ibm.com> wrote in message =
news:d3jc9u$5a0$2@news.eclipse.org...

and yes I know about the description in the help. I'm mainly wondering =
if there's a name for it "in the literature"
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2900.2604" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>We use a network simplex algorithm for =
assigning=20
ranks.  We also use this same algorithm for adjusting final x =
coordinates=20
by creating an auxilary graph as described by Stephen North et al (A =
technique=20
for directed graphs or something).  The rank ordering is done =
using=20
the tried but true approach of sweeping up and down the rows and =
assigning=20
values to the nodes and sorting them (Sugiyama).  We some modified=20
barycenter method I think.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV><<A href=3D"mailto:gresh@us.ibm.com">gresh@us.ibm.com</A>> =
wrote in=20
message <A=20
=
href=3D"news:d3jc9u$5a0$2@news.eclipse.org">news:d3jc9u$5a0$2@news.eclips=
e.org</A>...</DIV><BR><FONT=20
face=3Dsans-serif size=3D2>and yes I know about the description in the =
help. I'm=20
mainly wondering if there's a name for it "in the=20
literature"</FONT></BLOCKQUOTE></BODY></HTML>

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Re: DirectedGraphLayout: Algorithm used [message #177315 is a reply to message #177300]

Wed, 13 April 2005 12:51

Eclipse User

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Thank you-- your description is helpful to me--
Donna
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<br><font size=2 face="sans-serif">Thank you-- your description is helpful
to me--</font>
<br><font size=2 face="sans-serif">Donna</font>
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