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.
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
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@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<http://www.r-project.org/posting-guide.html>
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
>
> --
> Eric Lecoutre
> Consultant - Business & Decision
> Business Intelligence & Customer Intelligence
>
--
SG
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