Thanks a ton, much appreciated...

On 26-Jul-2012, at 7:56 PM, Michael Weylandt [via R] wrote:

> On Thu, Jul 26, 2012 at 3:59 AM, guruappa <[hidden email]> wrote:
> 
> > Hello all, 
> > 
> > I am a newbie at R, with some experience in PERL. 
> > 
> > I have a database table that contains the following data: 
> > Name      | Score 
> > ======= | ===== 
> > Sachin T  | 25 
> > Sachin T  | 53 
> > Sachin T  | 57 
> > Sachin T  | 34 
> > Rahul D   | 38 
> > Rahul D   | 31 
> > Rahul D   | 53 
> > Ricky P   |  7 
> > Ricky P   | 45 
> > Ricky P   | 27 
> > Ricky P   | 17 
> > Ricky P   | 86 
> > Ricky P   | 48 
> > Jacques K | 23 
> > Jacques K | 86 
> > Jacques K | 32 
> > 
> > I want the summary data as below: 
> > 
> > Name | Avg Score 
> > Jacques K|47.00 
> > Rahul D|40.67 
> > Ricky P|38.33 
> > Sachin T|42.25 
> > 
> > Currently, I am trying to pass the name of the person as an argument in a 
> > sql query by breaking the query into parts, and then concatenating the query 
> > string.  Of course, the scheme is not working. 
> > 
> > I want a query as below: 
> > SELECT NAME, SCORE FROM PLAYER_SCORE_TBL where NAME = ? 
> > 
> > Then I can pass the parameters like we do in PERL. 
> > 
> > If there is an alternative to the whole scheme, that would be wonderful.  a 
> > way that would just take the whole table, and provide pivot table like 
> > solution.
> 
> Many, but I'll give one: 
> 
> with(DataFrameName, tapply(Score, Name, mean)) 
> 
> also aggregate(), ave(), and many others. 
> 
> Off topic: you might look at the sqldf package to do sql-form queries 
> on R objects. 
> 
> Best, 
> Michael 
> 
> > 
> > Thanks in advance, 
> > Guruppa Padsali. 
> > 
> > 
> > 
> > 
> > -- 
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> > 
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