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Subject: R basic data manipulation Queries
From: Pavneet Arora <pavneet.ar...@uk.rsagroup.com>
To: pavnee...@yahoo.co.uk
CC:
Hello Guys
I am new in R, so please excuse the really basic questions. I have tried
reading numeral tutorials, but I am still stuck.
Question 1:
If I perform correlation on my data [cor(nums2)] or try to produce variance
matrix [var(nums2)]. The output comes in R console. Is there any way I can make
it go directly to excel somehow?
Question 2:
Also is there any way I can permanently change the variable name in a data
frame.
I basically imported my dataset from SAS using "read.ssd" function in
library(foreign). However, this package cuts off the variable names and only
allows 8 characters! So that means I will have to rename some of my variable
names, so they make more sense as to what it is.
part (a):
At the moment, I did the following to change the variable names, using
library(plyr). First of all, is this the most succint way of doing this?
new_acc <- rename(acc_mod,c("NAME_OF_"="weekName", "ACCIDENT"="AccSev",
"YEARMONH"="YrMonHr",
"X_1ST_ROA"="1RdCls.N", "ROAD_TYP"="RdType.N", "LOCATION"="LocEast"))
part (b):
Secondly, I wanted to do the above, to change the name permanently - but I
don't think it worked, because when I do the following, I get:
class(LocEast) # New name of "LOCATION"
class(LOCATION)
R Output:
> class(LocEast)
Error: object 'LocEast' not found
> class(LOCATION)
[1] "numeric"
Thanks so much!Â
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