[R] How to subset data, by sorting names alphabetically.

[Greg Snow]

The split function does essentially this, but puts the results into a list
rather than using the dangerous and messy assign function.  The overall
syntax is simpler as well.

On Thu, Feb 12, 2015 at 3:14 AM, Jim Lemon <drjimlemon at gmail.com> wrote:

> Hi Samarvir,
> Assuming that you want to generate a separate data frame for each
> value of "Name",
>
> # name of initial data frame is ssdf
> for(nameval in unique(ssdf$Name)) assign(nameval,ssdf[ssdf$Name==nameval,])
>
> This will produce as many data frames as there are unique values of
> ssdf$Name, each named by the values it contains.
>
> Jim
>
>
> On Thu, Feb 12, 2015 at 3:57 PM, samarvir singh <samarvir1996 at gmail.com>
> wrote:
> > hello,
> >
> > I am cleaning some large data with 4 million observation and 7 variable.
> > Of the 7 variables , 1 is name/string
> >
> > I want to subset data, which have same name
> >
> > Example-
> >
> >  Name var1 var2 var3 var4 var5 var6
> > aa        -       -       -         -     -        -
> > ab
> > bd
> > ac
> > ad
> > af
> > ba
> > bd
> > aa
> > av
> >
> > i want to sort the data something like this
> >
> > aa
> > aa
> > all aa in a same subset
> >
> > and all ab in same subset
> >
> > every column with same name in a subset
> >
> >
> >
> > thanks in advance.
> > I am new to R community.
> > appreciate your help
> > - Samarvir
> >
> >         [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > 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.
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>



-- 
Gregory (Greg) L. Snow Ph.D.
538280 at gmail.com

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