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Hello List, I would like to simplify a data.frame like this columnA columnB user10 proj12 user10 proj19 user10 proj12 into something like: columnA columnB columnC user10 proj12 2 user10 proj19 1 I know unique() can simplify the data.frame, but how to count and store the duplicates? thanks in advance for any help. best regards, Simone

...oes. I'm new to nonlinear optimization, so please forgive any obvious things I've overlooked. Thank you very much for taking a look! Here is the R code, and error message: ColumnA.data<-read.csv(file.choose()) #select ColA.csv ColumnB.data<-read.csv(file.choose()) #select ColB.csv ColumnC.data<-read.csv(file.choose()) #select ColC.csv colA<-ColumnA.data[0:3600,] colB<-ColumnB.data[0:3600,] colC<-ColumnC.data[0:3600,] i<-1:3600 cor.model<-nls(colC ~ exp( - beta2 * abs( colB[i] - colA[i] ) / 12 ) - ( 1 - exp( - beta2 * abs( colB[i] - colA[i] ) / 12 ) ) * exp( - be...

Hello, Assuming I have the following setup for one page: <column A><data from controller 1 /> </columnA> <column B><data from controller 2 /> </columnB> <column C><data from controller 3 /> </columnC> Assuming the page is created for Controller 2, what would be the best way(s) to gather/render the data from the other controllers? Best regards and thanks for your insight Fred -- Posted via http://www.ruby-forum.com/.