Hello all, thank you for your help. The task I need to perform is difficult to explain so I apologize a head of time for any confusion.
I have a data frame with these colnames() Reference_Position, Reference_Allele, Variant_Allele, Variant_Frequency, AAC_Variant. If a value is duplicated in the "Reference_Position" column, I would both of their "Variant_Frequency" values multiplied and inserted into a new data frame. example below: reference position 64 is repeated, multiple 94.155381 by 92.947658 and insert value into "Value". Because I do not know how to best explain this or phrase it into a logical questions, here is a before and after. Also, if you could explain the code a bit, that would be appreciated as well- teach and person to fish! Before >dat [Reference_Position] [Reference_Allele] [Variant_Allele] [Variant_Frequency] [AAC_Variant] 16 G A 91.833811 Val6Met,Met 52 G A 93.969466 Val18Ile 64 G T 94.155381 Val22Phe 73 C A 94.293478 Gln25Lys 131 G A 94.268168 Arg44Lys 64 G A 92.947658 Ser48Asn After >dat [Reference_Position] [Variant_Frequency] [Value] 16 91.833811 NA 52 93.969466 NA 64 94.155381 85.152215 73 94.293478 NA 131 94.268168 NA 64 92.947658 85.152215 -- View this message in context: http://r.789695.n4.nabble.com/Performing-multiplication-on-duplicate-values-tp4647772.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.