Re: [R] Multiplication of dataframes

2009-01-18 Thread Dimitris Rizopoulos
you should first transform them to matrices using data.matrix() and then do a matrix multiplication using %*%. This will create a matrix, which you can then convert to a data frame, if you want, using as.data.frame(). For instance, check the following: d1 <- data.frame(x = rnorm(10), y = rnor

[R] Multiplication of dataframes

2009-01-18 Thread glenn
If I have 2 data frames; df1:dim(df1) = (1,10) df2:dim(df2) = (2000,10) Both with column header names, how do I multiply them together please. I.e create a dateframe dim() = (2000,1) Many Thanks in advance Glenn [[alternative HTML version deleted]] _