[R] (no subject)

[Dario Strbenac]

If your data frame is called myDF,

max(myDF[myDF[, condition] == "GPR119a", "responce"])

---- Original message ----
>Date: 01 Feb 2011 19:05:46 +0000
>From: r-help-bounces at r-project.org (on behalf of "A. Ramzan" <ar562 at cam.ac.uk>)
>Subject: [R] (no subject)  
>To: r-help at r-project.org
>
>Hello
>
>I am trying to find a way to find the max value, for only a subset of a 
>dataframe, depending on how the data is grouped for example,
>
>How would I find the maxmium responce, for all the GPR119a condition below:
>
>responce,mouce,condition
>0.105902,KO,con
>0.232018561,KO,con
>0.335008375,KO,con
>0.387025433,KO,GPR119a
>0.576769897,KO,GPR119a
>0.645120419,KO,GPR119a
>0.2538608,KO,GPR119b
>0.183061952,KO,GPR119b
>0.824035587,KO,GPR119b
>0.399201597,KO,GPR119c
>0.417006618,KO,GPR119c
>0.572958834,KO,GPR119c
>0.229467444,KO,GPR119d
>0.294089745,KO,GPR119d
>0.309964445,KO,GPR119d
>0.30474325,KO,GPR119e
>0.159374839,KO,GPR119e
>0.467726848,KO,GPR119e
>1.01841912,KO,GPR119f
>0.423028621,KO,GPR119f
>0.223588597,KO,GPR119f
>
>Thank
>
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--------------------------------------
Dario Strbenac
Research Assistant
Cancer Epigenetics
Garvan Institute of Medical Research
Darlinghurst NSW 2010
Australia