Identifying the particular X or Y in a sorted list
Have you read "An Introduction to R?" If I understand correctly, your question is very basic and suggests that you have not yet made even a minimal effort on your own to learn R before asking for help from this list. -- Bert answer: A[C>B]
On Thu, May 3, 2012 at 11:14 AM, Shankar Lanke <shankarlanke at gmail.com> wrote:
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 at 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 at gmail.com Sent: Wed, 2 May 2012 22:06:54 -0400 To: r-help at 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 at 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.
____________________________________________________________ GET FREE SMILEYS FOR YOUR IM & EMAIL - Learn more at http://www.inbox.com/smileys Works with AIM?, MSN? Messenger, Yahoo!? Messenger, ICQ?, Google Talk? and most webmails
-- 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]]
______________________________________________ R-help at 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.
Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm