#question I have the following data set:
Date<-c("9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/8/2010")
EstimatedQuantity<-c(3535,2772,3279,3411,3484,3274,3305)
ScowNo<-c("4001","3002","4002","BR
8","4002","BR 8","4001")
dataset<- data.frame(EstimatedQuantity,Date,ScowNo)
#I'm trying to convert the data set into a contingency table and then back
into a regular data frame:
xtabdata<-as.data.frame.matrix(xtabs(EstimatedQuantity~Date+ScowNo,data=dataset),
row.names=(dataset$Date),optional=F)
#I'm trying to keep the row names (in xtabsdata) as the dates.
#But the row names keep coming up as integers.
#How can I preserve the row names as dates when
#the table is converted back to a data frame?
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David Winsemius
2013-May-17 19:05 UTC
[R] #Keeping row names when using as.data.frame.matrix
On May 17, 2013, at 9:46 AM, Tim wrote:> #question I have the following data set: > > Date<-c("9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/8/2010") > > EstimatedQuantity<-c(3535,2772,3279,3411,3484,3274,3305) > > ScowNo<-c("4001","3002","4002","BR 8","4002","BR 8","4001") > > dataset<- data.frame(EstimatedQuantity,Date,ScowNo) > > #I'm trying to convert the data set into a contingency table and then back > into a regular data frame: > > > xtabdata<-as.data.frame.matrix(xtabs(EstimatedQuantity~Date+ScowNo,data=dataset), > row.names=(dataset$Date),optional=F) > > #I'm trying to keep the row names (in xtabsdata) as the dates. > #But the row names keep coming up as integers. > #How can I preserve the row names as dates when > #the table is converted back to a data frame?It's a factor-problem (see the FAQ ?. read all of section 7, i'm too lazy to look it up again.): xtabdata<-as.data.frame.matrix(xtabs(EstimatedQuantity~Date+ScowNo,data=dataset), row.names=sort( unique( as.character(dataset$Date))), optional=F)> > > > > -- > View this message in context: http://r.789695.n4.nabble.com/Keeping-row-names-when-using-as-data-frame-matrix-tp4667344.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.David Winsemius Alameda, CA, USA
Hi,
library(plyr)
res<-dcast(dataset,Date~ScowNo,sum,value.var="EstimatedQuantity")
?rownames(res)<- res[,1]
res[,-1]
#???????? 3002 4001 4002 BR 8
#9/7/2010 2772 3535 6763 6685
#9/8/2010??? 0 3305??? 0??? 0
A.K.
----- Original Message -----
From: Tim <tfox at mde.state.md.us>
To: r-help at r-project.org
Cc:
Sent: Friday, May 17, 2013 12:46 PM
Subject: [R] #Keeping row names when using as.data.frame.matrix
#question I have the following data set:
Date<-c("9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/7/2010","9/8/2010")
EstimatedQuantity<-c(3535,2772,3279,3411,3484,3274,3305)
ScowNo<-c("4001","3002","4002","BR
8","4002","BR 8","4001")
dataset<- data.frame(EstimatedQuantity,Date,ScowNo)
#I'm trying to convert the data set into a contingency table and then back
into a regular data frame:
? ? ? ?
xtabdata<-as.data.frame.matrix(xtabs(EstimatedQuantity~Date+ScowNo,data=dataset),
? ? ? ? row.names=(dataset$Date),optional=F)
#I'm trying to keep the row names (in xtabsdata) as the dates.
#But the row names keep coming up as integers.
#How can I preserve the row names as dates when
#the table is converted back to a data frame?
--
View this message in context:
http://r.789695.n4.nabble.com/Keeping-row-names-when-using-as-data-frame-matrix-tp4667344.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.