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 = rnorm(10))
d2 <- data.frame(x = rnorm(10), y = rnorm(10))
res <- data.matrix(d1) %*% t(data.matrix(d2))
res
as.data.frame(res)
I hope it helps.
Best,
Dimitris
glenn wrote:
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
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--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
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and provide commented, minimal, self-contained, reproducible code.
