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Re: [igraph] tkplot

From: Gabor Csardi
Subject: Re: [igraph] tkplot
Date: Tue, 28 Nov 2006 23:06:23 +0100
User-agent: Mutt/1.5.11


you don't do anything wrong, R's plot and Tk (which is used by tkplot)
handles the coordinates differently, so you need to 'flip' the coordinates,
do something like 

coord[,2] <- -coord[,2]

Perhaps i should modify tkplot to invert the coordinates because modifying
plot's behavior would be confusing if one wants to add additional objects to
the plot. But changing tkplot is not very clean either since then all calls
to the Tk library should be changed. Anyway i added this to the TODO list, 
thanks for reporting it!


On Tue, Nov 28, 2006 at 03:06:21PM -0500, Vincent Matossian wrote:
>  The following gives me problems:
> g <- graph(c(0,1,1,2,2,3,3,4))
> tkplot(g) # say I get 1 as a tkp.id
> I then adjust the vertices in a suitable manner and try
> coord<- tkplot.getcoord(1)
> When I try
> plot(g,layout=coord)
> The result is equivalent to having tkplot be in "fit to screen" mode with a
> rotation of 180 degrees and does therefore not look as I expected.
> Is this a known issue or am I missing something?
> thanks for your help,
> vincent

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Csardi Gabor <address@hidden>    MTA RMKI, ELTE TTK

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