[BioC] Genome Graphs question

[Paul Leo]

So have genomeGraphs making plots I need. BUT have come to a catch; I
want to add the genomeGraph plots as part of other plots using the
typical layout() command. However the genomeGraphs "plot" command
gdPlot() writes a new plot when it is called, or overwrites layout .
Can't find options to fix. 

For example in below I would like to make a plot of x vs X^2 above a
genome graphs plot but this fails:


########## get goodies for genome graphs
library(GenomeGraphs)
mart <- useMart("ensembl", dataset="hsapiens_gene_ensembl")
minStrand <- makeGeneRegion(chromosome = 17,start = 30450000, end =
30550000,strand = "-", biomart = mart)
ideogram <- makeIdeogram(chromosome = 17)
genomeAxis <- makeGenomeAxis(add53 = TRUE,add35 = TRUE)
####################

nf <- layout(matrix(c(1,2), byrow=TRUE))
layout.show(nf)
x<-1:100
y<-x^2
plot(x,y)
gdPlot(list(ideogram, plusStrand, genomeAxis, minStrand), minBase =
30450000, maxBase = 30550000)


> sessionInfo()
R version 2.9.0 (2009-04-17) 
x86_64-pc-linux-gnu 

locale:
LC_CTYPE=en_AU.UTF-8;LC_NUMERIC=C;LC_TIME=en_AU.UTF-8;LC_COLLATE=en_AU.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_AU.UTF-8;LC_PAPER=en_AU.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_AU.UTF-8;LC_IDENTIFICATION=C

attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets
methods  
[8] base     

other attached packages:
[1] GenomeGraphs_1.4.0 biomaRt_2.0.0     

loaded via a namespace (and not attached):
[1] lattice_0.17-22 RCurl_0.94-1    tools_2.9.0     XML_1.95-3