[R] Converting the columns of a data frame to numeric

[Daniel Mastropietro]

Hello,

I have a data frame whose columns are factors with numeric levels and I 
want to convert the columns to numeric so that I can treat the data frame 
as a matrix.
I found a way of doing this but would like to know if there is an easier way.

My way is:

M <- matrix(ncol=ncol(df) , nrow=nrow(df) , as.numeric(as.matrix(df)))

where 'df' is the data frame.

I am wondering if there is a function, similar to as.numeric(), that 
converts each column of the matrix 'as.matrix(df)' to numeric.

Thanks
Daniel Mastropietro

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