[R] matrix math

[r user]

>   I am using R 2.1.1 in an windows XP environment.
>    
>   I have 2 dataframes, temp1 and temp2.
>    
>   Each dataframe has 20 variables (“cocolumns") and
> 525 observations (“rows”).  All variables are
> numeric.
>    
>   I want to create a new dataframe that also has 20
> columns and 525 rows.  The values in this dataframe
> should be the sum of the 2 other dataframe.
>    
>   (i.e. temp1$column 1+temp2$column1,
> temp1$column2+temp2$column2, etc)
>    
>   What is the best/easiest way to accomplish this?
>    
>   Is I wish to "multiply" (instead of sum) the
> columns, how do I?
>    
>   I tried:
>    
>   temp3<-as.matrix(temp1)+as.matrix(temp2)
>    
>   I get the following error message: “Error in
> as.matrix(temp1) + as.matrix(temp2) : 
>           non-numeric argument to binary operator” 
> 
> 
> 		
> ---------------------------------

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