[R] matrix math

[Jack Tanner]

>  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.

>foo <- data.frame(c(1,1,1,1),c(2,2,2,2))
>bar <- data.frame(c(1,2,3,4),c(5,6,7,8))
>foo+bar
  c.1..1..1..1. c.2..2..2..2.
1             2             7
2             3             8
3             4             9
4             5            10

If your data frames are actually data frames, it should work.
>class(foo)
[1] "data.frame"