Adding rows based on column value
?tapply (in base R) ?aggregate ?by (wrapper for tapply) ?ave (in base R -- based on tapply) Also package plyr (and several others, undoubtedly). Also google on "R summarize data by groups" or similar gets many relevant hits. -- Bert 2011/7/14 Bansal, Vikas <vikas.bansal at kcl.ac.uk>:
Dear all,
I have one problem and did not find any solution.(I have also attached the problem in text file because sometimes column spacing is not good in mail)
I have a file(file.txt) attached with this mail.I am reading it using this code to make a data frame (file)-
file=read.table("file.txt",fill=T,colClasses = "character",header=T)
file looks like this-
?Chr ? ? ? Pos ? ? ? ? ? ?CaseA ? ? CaseC ? ? ? ? ? ?CaseG ? ? ?CaseT
?10 135344110 ?0.000000 24.000000 ?0.000000 ?0.000000
?10 135344110 ?0.000000 ?0.000000 24.000000 ?0.000000
?10 135344110 ?0.000000 ?0.000000 24.000000 ?0.000000
?10 135344113 ?0.000000 ?0.000000 24.000000 ?0.000000
?10 135344114 24.000000 ?0.000000 ?0.000000 ?0.000000
?10 135344114 24.000000 ?0.000000 ?0.000000 ?0.000000
?10 135344116 ?0.000000 ?0.000000 ?0.000000 24.000000
?10 135344118 ?0.000000 24.000000 ?0.000000 ?0.000000
?10 135344118 ?0.000000 ?0.000000 ?0.000000 24.000000
?10 135344122 24.000000 ?0.000000 ?0.000000 ?0.000000
?10 135344122 ?0.000000 24.000000 ?0.000000 ?0.000000
?10 135344123 ?0.000000 24.000000 ?0.000000 ?0.000000
?10 135344123 ?0.000000 24.000000 ?0.000000 ?0.000000
?10 135344123 ?0.000000 ?0.000000 ?0.000000 24.000000
?10 135344126 ?0.000000 ?0.000000 24.000000 ?0.000000
Now some of the values in column Pos are same.for these same positions i want to add the values of columns 2:6
I will explain with an example-
The output of first row should be-
?Chr ? ? ? Pos ? ? ? ? ? ?CaseA ? ? CaseC ? ? ? ? ? ?CaseG ? ? ?CaseT
?10 135344110 ?0.000000 24.000000 ?48.000000 ?0.000000
so the whole output for above input should be-
?Chr ? ? ? Pos ? ? ? ? ? ?CaseA ? ? CaseC ? ? ? ? ? ?CaseG ? ? ?CaseT
?10 135344110 ? ?0.000000 ?24.000000 ?48.000000 ? ?0.000000
?10 135344113 ? ?0.000000 ? 0.000000 ? 24.000000 ? ?0.000000
?10 135344114 ?48.000000 ?0.000000 ? ?0.000000 ? ? 0.000000
?10 135344116 ? 0.000000 ? 0.000000 ? ?0.000000 ? ?24.000000
?10 135344118 ? 0.000000 ?24.000000 ? 0.000000 ? ?24.000000
?10 135344122 ?24.000000 24.000000 ? 0.000000 ? ?0.000000
?10 135344123 ? 0.000000 ?48.000000 ? 0.000000 ? ?24.000000
?10 135344126 ? 0.000000 ?0.000000 ? ?24.000000 ? 0.000000
Can you please help me.
Thanking you,
Warm Regards
Vikas Bansal
Msc Bioinformatics
Kings College London
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