How do I make a list of data frames and how do I access each of those data frames from the list? I can't find a simple example of this anywhere.
SO is telling me my post is too short, so I'll get the ball rolling by making a few data frames to be put in a list.
This isn't related to your question, but you want to use
= and not
<- within the function call. If you use
<-, you'll end up creating variables
y2 in whatever environment you're working in:
d1<-data.frame(y1<-c(1,2,3),y2<-c(4,5,6)) y1 #  1 2 3 y2 #  4 5 6
This won't have the seemingly desired effect of creating column names in the data frame:
d1 # y1....c.1..2..3. y2....c.4..5..6. # 1 1 4 # 2 2 5 # 3 3 6
= operator, on the other hand, will associate your vectors with arguments to
As for your question, making a list of data frames is easy:
d1 <- data.frame(y1=c(1,2,3),y2=c(4,5,6)) d2 <- data.frame(y1=c(3,2,1),y2=c(6,5,4)) my.list <- list(d1, d2)
You access the data frames just like you would access any other list element:
my.list[] # y1 y2 # 1 1 4 # 2 2 5 # 3 3 6