Re: [igraph] slow plotting (igraph 0.6.5-2, MacOS)

[P S Das]

Dear All

Suddenly im finding a silly error in igraph

g <- graph( c(0,1, 1,2, 3,4, 5,6) )

Error in graph(c(0, 1, 1, 2, 3, 4, 5, 6)) : 

  At structure_generators.c:84 : Invalid (negative) vertex id, Invalid vertex id

but if i put

 g <- graph( c(1,2, 3,4, 5,6) )

> g

IGRAPH D--- 6 3 --

doesnot give any error

so far i know the vertices in igraph starts from 0. 

I am using R version 2.15.3 and i graph version  0.6.5-2 

Regards,
Partha Sarathi Das

RA,
Bioinformatics Infrastructure Facility,
Vidyasagar University,
Midnapore, India

Mobile : +91 98 31 32 32 32

On Wed, Jul 3, 2013 at 12:25 AM, Baptiste Coulmont <address@hidden> wrote:

pdf("plot.pdf") is indeed much faster : 0.158 seconds.

My problem wasn't linked to igraph, but to quartz()

Thanks

B. Coulmont

 

. .
Baptiste Coulmont
address@hidden
--------

---

From: Gábor Csárdi <address@hidden>
To: Baptiste Coulmont <address@hidden>; Help for igraph users <address@hidden>
Sent: Tuesday, July 2, 2013 3:12 PM
Subject: Re: [igraph] slow plotting (igraph 0.6.5-2, MacOS)

Hi, 

are you sure, this is igraph? 

Can you try 1) plotting to a PDF device instead of quartz() or x11() which take a long time to start, and also 2) plotting something else instead of an igraph graph, of comparable size, e.g. 100 circles and 100 segments? 

Thanks,

Gabor

On Tue, Jul 2, 2013 at 8:33 AM, Baptiste Coulmont <address@hidden> wrote:

Hi

As with  http://lists.nongnu.org/archive/html/igraph-help/2013-02/msg00118.html

I see that plot.igraph is much slower now than before 

It seems that only MacOS is affected (plotting is much faster on Windows)

I need 18 seconds with the code below [R 3.0.1, MacOS 10.8.4, 2011 MacAir]

library(igraph)

r=erdos.renyi.game(100,p=0.1)

system.time(plot.igraph(r,layout=layout.circle))

 

Best regards,

B. Coulmont

. .
Baptiste Coulmont
address@hidden
--------

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