Tena koe Maria It seems you need to multiply Flow by 0.05+ASBClass/20 (i.e., no if calls are necessary)
HTH .... Peter Alspach -----Original Message----- From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Maria Lathouri Sent: Tuesday, 15 September 2015 10:57 p.m. To: r-help@r-project.org Subject: [R] Multiple if function Dear all, I am writing as I would like your help. I have a dataframe with two columns, ASB and Flow, where the the first one has values 1, 2 or 3 and the second flow data. Something like that: ASBclass Flow1 11.51 9.2 2 10.5 3 6.7 ... ... I would like to produce a third column named eg. deviation where it would get me values based on if ASBclass is 1, multiply Flow by 0.1; if ASBclass is 2 then multiply Flow by 0.15 and if ASBclass is 3 then multiply by 0.2. If (ASBclass=1) { deviation<-Flow*0.1} If (ASBclass=2) { deviation<-Flow*0.15}If (ASBclass=1) { deviation<-Flow*0.2} I am not sure whether I should add the else function and how can I combine these separate functions. Can anyone help me on that? Thank you very much. Kind regardsMaria [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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. The contents of this e-mail are confidential and may be subject to legal privilege. If you are not the intended recipient you must not use, disseminate, distribute or reproduce all or any part of this e-mail or attachments. If you have received this e-mail in error, please notify the sender and delete all material pertaining to this e-mail. Any opinion or views expressed in this e-mail are those of the individual sender and may not represent those of The New Zealand Institute for Plant and Food Research Limited. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
