On 30.10.2010 13:50 (UTC+1), Santosh Srinivas wrote:
A more usable problem input would definitely help ... use dput to send a
reproducible sample to the group
Think the below should solve your problem
read.csv("Book1.csv")
Subject Item Score
1 Subject 1 Item 1 1
2 Subject 1 Item 2 0
3 Subject 1 Item 3 1
4 Subject 2 Item 1 1
5 Subject 2 Item 2 1
6 Subject 2 Item 3 0
library("reshape2")
tDat.m<- melt(tDat)
tDatCast<- acast(tDat.m,Subject~Item)
tDatCast
Item 1 Item 2 Item 3
Subject 1 1 0 1
Subject 2 1 1 0
# Or without using package reshape2, only function reshape from stats:
df <- data.frame(Subject=
c("Subject 1","Subject 1","Subject 1","Subject 1",
"Subject 2","Subject 2","Subject 2","Subject 2"),
Item =
c("Item 1","Item 2","Item 3","Item 4",
"Item 1","Item 2","Item 3","Item 4"),
Score = c(1,0,1,1,1,1,0,0))
df.wide <- reshape(df, idvar="Subject", timevar="Item", direction="wide")
names(df.wide) <- c("Subject",unique(as.character(df$Item)))
df.wide
Subject Item 1 Item 2 Item 3 Item 4
1 Subject 1 1 0 1 1
5 Subject 2 1 1 0 0
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Ajay Ohri
Sent: 30 October 2010 16:27
To: Rhelp
Subject: [R] transforming a dataset for association analysis
Hi
I would like to transform a data frame like
Subject Item Score
Subject 1 Item 1 1
Subject 1 Item 2 0
Subject 1 Item 3 1
Subject 2 Item 1 1
Subject 2 Item 2 1
Subject 2 Item 3 0
....
*to *
Subject Item1 Item2 Item3 .....Item N
Subject1 1 0 1
Subject2 1 1 0
........
SubjectP..
Apologize for the simple nature of my query but I am stuck. How can I do
this transformation?
Regards
Ajay
Websites-
http://decisionstats.com
http://dudeofdata.com
Linkedin- www.linkedin.com/in/ajayohri
On Sat, Oct 30, 2010 at 2:39 PM, Alaios<ala...@yahoo.com> wrote:
Hello everyone.
I have written quite a big function that at the end correctly returns the
values
I want. I found a rare exception that I want to cover also. The easier for
me
would be to write something like that
function(){
if (rare exception happened)
return that value
# The comes the code for normal execution
# ...
# ...
return value # Normal values to return
}
Would that be feasible with R or two returns statements are not accepted?
Regards
Alex
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