[R] Creating a sequence of variables in a data frame

[Spencer Graves]

 > data1 <- data.frame(old=1:2)
 > data1$old2 <- 3:4
 > data1
   old old2
1   1    3
2   2    4

Acceptable?
Spencer Graves

Ryan T. Moore wrote:
> Two questions:
> 
> 1.  I have a data frame named "data1" that includes the variable "old".  I want to create a sequence of new variables in the data frame called "old.1", "old.2", ... .  I've tried a few "paste" commands, and creating a new data frame of the new variables, all to no avail.  Any advice?
> 
> 2.  If I have a variable in a data frame, is there quick bit of code that creates a dummy variable for each level of that variable?
> 
> Thank you,
> Ryan Moore 
> 
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