reshaping a data frame

On Mon, Jun 10, 2013 at 7:13 AM, arun <smartpink111 at yahoo.com> wrote:

Hi,If your dataset is similar to the one below:
set.seed(24)
temp1_df<- data.frame(names=rep(c('foo','foo1'),each=6),variable=rep(c('w','x'),times=6),value=sample(25:40,12,replace=TRUE),stringsAsFactors=FALSE)

library(reshape2)
 res<-dcast(within(temp1_df,{Seq1<-ave(value,names,variable,FUN=seq_along)}),names+Seq1~variable,value.var="value")[,-2]
res
#  names  w  x
#1   foo 29 28
#2   foo 36 33
#3   foo 35 39
#4  foo1 29 37
#5  foo1 37 29
#6  foo1 34 30
A.K.


----- Original Message -----
From: Abhishek Pratap <abhishek.vit at gmail.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc:
Sent: Monday, June 10, 2013 2:15 AM
Subject: [R] reshaping a data frame

Hi Guys

I am trying to cast a data frame but not aggregate the rows for the
same variable.

here is a contrived example.

**input**
temp_df  <- data.frame(names=c('foo','foo','foo'),variable=c('w','w','w'),value=c(34,65,12))

temp_df

  names variable value
1   foo        w    34
2   foo        w    65
3   foo        w    12


###########
**Want this**
############
names  w
foo         34
foo         65
foo         12


##
**getting this***
##

cast(temp_df)

Aggregation requires fun.aggregate: length used as default
  names w
1   foo 3


In real dataset  the categorical column 'variable' will have many more
categorical variable.

Thanks!
-Abhi