[R] generating a bar chart with two axis for co-linear variable

[arun]

HI,

May be this helps:
dat1<- read.table("sampledata.txt",header=TRUE,sep=",",stringsAsFactors=FALSE)
pdf("Barplots.pdf")
 lst1<-lapply(seq_len(ncol(dat1)),function(i) {Ctdat<- table(dat1[,i]);Ctdat1<-(Ctdat/sum(Ctdat))*100;barplot(Ctdat1,ylim=c(0,100),xlab=colnames(dat1)[i],ylab="Relative Frequency",main=paste("Barplot:",colnames(dat1)[i],sep=" "))})
dev.off()
A.K.




----- Original Message -----
From: Sudha Krishnan <Sudha.Krishnan at marlabs.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc: 
Sent: Thursday, June 6, 2013 2:37 AM
Subject: [R]  generating a bar chart with two axis for co-linear variable



Hello Dimitris,



I was goggling for some help on Sensitivity vs 1-specificity and saw your link.



I hope you can be of help to me in one of the issue that I am facing in generating combo chart(bar chart and plot). I am a novice and have some difficulty in getting this logic correct.





I am give a dataset (I am attaching a sample dataset).



I am using a barplot() and passing values for percentage frequency and the corresponding variables. I am struck here, what my function does is only calculate the frequency for the listed variables and not the frequency percentage. Is there a method or a script with which I can pass the frequency percent and the related values as category columns for x axis?



I will attach the graphs that I have generated so that you can suggest the better way.



Sampledata - Sampledata.txt

What my function does to calculate the frequency with category names in X axis - 1.png

My requirement is to generate percentage frequency of the variable in y1 and not the frequency itself. 2.png (where x categories are missing)





Thanks,

Sudha Krishnan



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