# [Rd] drawing the graph with many nodes

Whit Armstrong armstrong.whit at gmail.com
Tue Mar 27 13:11:28 CEST 2012

```if you don't mind going outside of R to create it, then check out
Graphviz: http://www.graphviz.org/Gallery.php

you may have to reformat your data a little, but this tool is great
for drawing graphs.

-Whit

On Tue, Mar 27, 2012 at 5:14 AM, MSousa <ricardosousa2000 at clix.pt> wrote:
> Good morning,
>
>
> I'm trying to draw a graph, and I'm using the following code.
>
> sep=",")
> colnames(test.matrix) <- gsub("X", "", colnames(test.matrix))
> #drop first column
> drops <- c("")
> test.matrix<-test.matrix[,!(names(test.matrix) %in% drops)]
> test.matrix
> test.matrix<-data.matrix(test.matrix)
> am.graph
> plot(am.graph, attrs = list(node = list(fillcolor = "lightblue"),edge =
> list(arrowsize=0.5)))
>
>
> The file testgephi.csv is following.
> "","1","2","3","4","5"
> "1",393,55,66,44,88
> "2",44,23,47,57,89
> "3",57,87,98,456,43
> "4",77,767,86,32,77
> "5",43,88,23,76,46
>
>  In the example graph of the drawing works well, the problem is when I'm
> trying to draw the graph from a file wih A graphAM graph with directed edges
> Number of Nodes = 217
> Number of Edges = 32804
>
> is there any package or tool that can draw a structure like this
>
>
>   Thanks
>
>
> --
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>
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```