Dear Bioconductor developers, I'm using Rgraphviz packages for plotting graphs. I would like to know if I can label nodes with information that can be displayed on more lines. Something like: ------------ | info1 | | info2 | | info3 | ------------ I looked at the drawTxtLabel() function and I try to give as label for the node: nodeLabel = 'info1 \n info2 \n info3' but it didn't work. Can somebody tell me if he managed to plot such labels, and if is possible some small code will be nice. Many thanks, Adrian -- Adrian Alexa Max-Planck-Institut fuer Informatik Stuhlsatzenhausweg 85 Room 514 66123 Saarbruecken, Germany

Hi Adrian, 1. Have you tried escaping the \n multiple times, e.g. \\n, \\\\n? Without understanding the details, sometimes this works. 2. You could use the "text" command, e.g. nag = agopen( IMCAGraph, name="nag", attrs= list(node=list(color="white", fontcolor="white"), edge=list(arrowsize=2.8, minlen=3))) nagxy = getNodeXY( nag ) plot( nag ) text( nagxy, label=nodes(IMCAGraph), cex=.8) with that your approach of including \n should work. This code example is due to Vince Carey. A potential problem may be that the arrows might overlap with the labels. 3. As an alternative, consider the imageMap function in Rgraphviz, with which you can associate tooltips and hyperlinks to (bitmap versions of) your graph visualizations. Best wishes Wolfgang Adrian Alexa wrote: > Dear Bioconductor developers, > > > I'm using Rgraphviz packages for plotting graphs. > > I would like to know if I can label nodes with information that can be > displayed on more lines. Something like: > > ------------ > | info1 | > | info2 | > | info3 | > ------------ > > > I looked at the drawTxtLabel() function and I try to give as label for > the node: > > nodeLabel = 'info1 \n info2 \n info3' > > but it didn't work. > > Can somebody tell me if he managed to plot such labels, and if is > possible some small code will be nice. > > > > Many thanks, > > Adrian > > -- Best wishes Wolfgang ------------------------------------- Wolfgang Huber European Bioinformatics Institute European Molecular Biology Laboratory Wellcome Trust Genome Campus Cambridge CB10 1SD England Phone: +44 1223 494642 Http: www.dkfz.de/abt0840/whuber

Sean Davis wrote: > Wolfgang, > > Thanks for the example code. Could I impose on you to expound a bit on > (3)? > Have you seen the manual page for imageMap in package Rgraphviz? Let me know if it leaves any open questions. -- Best wishes Wolfgang ------------------------------------- Wolfgang Huber European Bioinformatics Institute European Molecular Biology Laboratory Wellcome Trust Genome Campus Cambridge CB10 1SD England Phone: +44 1223 494642 Http: www.dkfz.de/abt0840/whuber