histo.ntstress<-hist(gene.stress.pct[cell.index.ntstress],breaks=seq(0,ceiling(max(gene.stress.pct)*100)/100,0.005),main="Distribution of Stress Gene Expression in Transcriptome",xlab="% of transcriptome associated to stress genes",plot=FALSE)
plot(histo.ntstress$mids,histo.ntstress$density,col=rgb(0,1,0,1/5),xlim=c(0,ceiling(max(gene.stress.pct)*100)/100),ylim=c(0,ceiling(max(histo.stress$density,histo.ntstress$density)/10)*10),type="h",lend="square",lwd=10,xlab="Fraction of transcriptome associated to stress genes",ylab="Density")