Message-ID: <Pine.LNX.4.64.0702141002380.21570@gannet.stats.ox.ac.uk>
Date: 2007-02-14T10:10:09Z
From: Brian Ripley
Subject: R GUI : any suggestion??
In-Reply-To: <d4327f7e0702140151j305a0413ta574a78e49a79b5a@mail.gmail.com>
Please stop misusing this list, which is about DBMS interfaces in R.
This is the third irrelevant posting from you this month, in each case
with a misleading and unspecific title.
R-help is the list for basic R questions, and this has nothing to do with
any 'R GUI' (nor does this list).
There is a posting guide, and it asks you to do your homework. Try the
help on the functions aggregate(), by ()and tapply()
On Wed, 14 Feb 2007, d. sarthi maheshwari wrote:
> Hi
>
> Please suggest me how to implement "Group by" function of SQL in R GUI?
>
> e.g.
> input data.frame
> x y
> ============
> a 10
> b 20
> a 10
> a 10
> b 15
> b 15
> b 20
>
> In o/p i need
>
> x y
> =========
> a 30
> b 70
>
>
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595