R help - Apr 2010 - fit a line to power law distribution

Hi,

I am trying to fit a line in the log plot of my networks degree distribution
to show that it is a power-law distribution. I am using the following
commands. However, I am not able to see the fitted line. Any comments to
help?
I am using following packages: igraph, splines,base,VGAM, netmodels.
g is my network, d is the degree of nodes in the network, and dd is the
degree distribution

d <-degree(g)
dd <- degree.distribution(g)
fit<power.law.fit(d,20)
plot(dd,log="xy")
abline(fit)

Thanks in advance.
Regards, *Narcissus*

	[[alternative HTML version deleted]]

Hi,

perhaps the example at
http://igraph.sourceforge.net/screenshots2.html#8
helps.

Best,
Gabor

On Tue, Apr 20, 2010 at 6:42 PM, Narges Zarabi <narges.zarabi at
gmail.com> wrote:
> Hi,
>
> I am trying to fit a line in the log plot of my networks degree
distribution
> to show that it is a power-law distribution. I am using the following
> commands. However, I am not able to see the fitted line. Any comments to
> help?
> I am using following packages: igraph, splines,base,VGAM, netmodels.
> g is my network, d is the degree of nodes in the network, and dd is the
> degree distribution
>
> d <-degree(g)
> dd <- degree.distribution(g)
> fit<power.law.fit(d,20)
> plot(dd,log="xy")
> abline(fit)
>
> Thanks in advance.
> Regards, *Narcissus*
>
> ? ? ? ?[[alternative HTML version deleted]]
>
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>


-- 
Gabor Csardi <Gabor.Csardi at unil.ch>     UNIL DGM