Hi Charles, you need to supply the layout explicitly to the function, set rescale=FALSE as well, and maybe also set xlim and ylim, e.g.:
coords <- layout.auto(gtest) plot(gtest, layout=coords, rescale=FALSE, xlim=range(coords[,1]), ylim=range(coords[,2])) G. On Wed, May 22, 2013 at 12:18 PM, Charles Novaes de Santana < [email protected]> wrote: > Dear list, > > I am trying to combine the plot of a network and the plot of some > points in the same plot (I want to plot the "legend" of the network, > associating the sizes of the nodes to some characteristics of my > phenomena). To do it, I am using the function "points" of package > "graphics" in R. But I am facing some difficulties to define the size > of the points I am plotting. Is there any ratio between the size of a > point plotted with igraph (the vertex of a network) and the size of a > point plotted with other functions of R (for example, the function > "points")? > > An example: > > library(igraph) > > mat<-matrix(0,nrow=2,ncol=2) > mat[1,2]<-1 > gtest<-graph.adjacency(mat) > plot(gtest,vertex.size=c(10,20),vertex.color=c("blue","red")) > points(0,0,pch=19,cex=10,col="green") > > I supposed that if the sizes used to both, igraph and R, were the > same, the size of the green point would be the same of the blue node > of the network. But I was wrong. > > Any help is much appreciated! > > Best regards, > > Charles > -- > Um axé! :) > > -- > Charles Novaes de Santana > http://www.imedea.uib-csic.es/~charles > PhD student - Global Change > Laboratorio Internacional de Cambio Global > Department of Global Change Research > Instituto Mediterráneo de Estudios Avanzados(CSIC/UIB) > Calle Miquel Marques 21, 07190 > Esporles - Islas Baleares - España > > Office phone - +34 971 610 896 > Cell phone - +34 660 207 940 > > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help > -- Gabor Csardi <[email protected]> MTA KFKI RMKI
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