Dear John,

Thank you very much for your response, I appreciate your input.
I am able to subtract the two columns, (B - C) , the subset information I
need is how many "A"s and who are the "A". For example P,Q,R,S,T, persons
earned $  7, 2, 3, 6, 9  in 1 st month and  $ 4, 6, 9, 2, 5 in 2nd month. I
want to identify who earned more   on 1st month + the difference (only if
it is positive). In this case P,S,T earned $3,4,4, in 2nd month.



mydata  <- data.frame( a = c(1, 2, 3, 4 , 5), b  =  c(7, 2, 3, 6, 9), c  =
c(4, 6, 9, 2, 5))
mydata$d  <- mydata$b - mydata$c
mydata
subset(mydata, mydata$d ==max(mydata$d))

On Thu, May 3, 2012 at 2:47 PM, John Kane <jrkrideau@inbox.com> wrote:

> **
> I'm sorry, it's still not clear what you are doing but perhaps this is
> close?
>
> mydata  <- data.frame( a = c(1, 2, 3, 4 , 5), b  =  c(7, 2, 3, 6, 9), c  =
> c(4, 6, 9, 2, 5))
> mydata$d  <- mydata$b - mydata$c
> mydata
> subset(mydata, mydata$d ==max(mydata$d))
>
>
>
> John Kane
> Kingston ON Canada
>
>
> -----Original Message-----
> *From:* shankarlanke@gmail.com
> *Sent:* Thu, 3 May 2012 14:14:17 -0400
> *To:* jrkrideau@inbox.com
> *Subject:* Re: [R] Identifying the particular X or Y in a sorted list
>
> Dear All,
> Thank you very much in advance.
>
> I have a data sets as shown below A (Patient ID ), B and C are the
> Concentration of drug in blood on day 1 and day 4, D is the difference in
> conc. To do this in R I have written a code as follows, identified the
> number of patients who have more concentration on day 4 . Here I want to
> identify specifically the patient ID (is he patient 1 or 2 or 5 and 7),
> whose concentration is more.
> How to write a code to get the list of A (patient ID whose difference is
> more on day 4).
>
>
> A 1 2 3 4 5
> B 7 2 3 6 9
> C 4 6 9 2 5
> (B-C) 3 -4 -6 4 4
>
> DF1<-list(A,B,C)
> DF1
>
> DF2<-(DF1$C-DF1$B)
> length(DF2)
> sum(DF2>0)
>
> #I want to subtract B from C to see and identify how many patients have
> greater concentrations and who are these patients (A).
>
>
> On Thu, May 3, 2012 at 12:15 PM, John Kane <jrkrideau@inbox.com> wrote:
>
> You do not seem to have suppied either code nor data.  Please supply both.
>
> John Kane
> Kingston ON Canada
>
>
> > -----Original Message-----
> > From: shankarlanke@gmail.com
> > Sent: Wed, 2 May 2012 22:06:54 -0400
> > To: r-help@r-project.org
> > Subject: [R] Identifying the particular X or Y in a sorted list
> >
> > Dear All,
> >
> > I have a data sets as shown below A (Patient ID ), B and C are the
> > Concentration of drug in blood on day 1 and day 4, D is the difference in
> > conc. To do this in R I have written a code as follows, identified the
> > number of patients who have more concentration on day 4 . Here I want to
> > identify specifically the patient ID (is he patient 1 or 2 or 5 and 7),
> > whose concentration is more.
> > How to write a code to get the list of A (patient ID whose difference is
> > more on day 4).
> >
> > Data<-(myDf$B-myDf$C)
> > sum(Data>0)
> >
> >   A B CD (B-C)  1 14 10 4  2 12 7 5  3 11 15 -4  4 8 3 5  5 1 8 -7
> >
> > I appreciate your help, thank you very much in advance.
> >
> > Regards
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> > http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
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>
> --
> Regards,
> Shankar Lanke Ph.D.
> Assistant Professor
> Department of Pharmaceutical Sciences
> College of Pharmacy
> The University of Findlay
> (C) 678-232-3567
> (O) 419-434-5448
> Fax# 419-434-4390
>
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-- 
Regards,
Shankar Lanke Ph.D.
Assistant Professor
Department of Pharmaceutical Sciences
College of Pharmacy
The University of Findlay
(C) 678-232-3567
(O) 419-434-5448
Fax# 419-434-4390

	[[alternative HTML version deleted]]

