On Nov 23, 2011, at 10:19 AM, Smart Guy wrote:
Hi Eric,
Thanks for the reply.
Actually, I am looking for a way so that my custom attributes are
not lost
after the row insert operation. It can be rbind() or some other way.
dfm <- dfm[c(1,1:nrow(dfm), ]
dfm[ 1, ] <- c(age=16, weight= 42)
Regards,
SG
On 23 November 2011 18:07, Eric Lecoutre <ericlecou...@gmail.com>
wrote:
I guess rbind takes attributes from the first dataframe.
I tried to rbind with mydata[NULL,,drop=FALSE] but rbind help
states that
empy data frames are dropped from rbind.
So that as a workaround, I have:
mydata*<-* rbind
(mydata[1,,drop=FALSE],newrow, mydata)[-1,]
Eric
On 23 November 2011 13:20, Smart Guy <smartgu...@gmail.com> wrote:
Hi All,
I was adding a new row of data to my data frame using
rbind(). I
was surprised to see that after adding new row, I lost my data
frame level
attibute as well as col level attribute. Please help me to insert
a new
row at frist or middle position so that my custom attribute is not
lost.
Here is what I did.
age<-c(15,20,18)
weight<-c(40,42,30)
### creating my data frame ####
mydata <- data.frame(age,weight)
### creating data frame level attribute ####
attr(mydata,"myattr")<-c("myinfo")
### creating col level attribute for 'age' column ###
attr(mydata$age,"mycolattr")<-c("mycolinfo")
#### Checking attributes ###
attributes(mydata)
attributes(mydata$age)
### creating new row #####
newrow <- data.frame(age=16, weight= 42)
#### Inserting newrow as first row to my data frame ####
mydata<- rbind(newrow, mydata)
#### Checking attributes again ### I lost my custom attributes
attributes(mydata$age)
attributes(mydata)
Thanks in advance,
--
SG
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--
Eric Lecoutre
Consultant - Business & Decision
Business Intelligence & Customer Intelligence
--
SG
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David Winsemius, MD
West Hartford, CT
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