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

-----Original Message-----
From: sudha.krishnan at marlabs.com
Sent: Thu, 6 Jun 2013 06:37:41 +0000
To: r-help at r-project.org
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