, 2009 9:48 AM
To: dolar; r-help@r-project.org
Subject: Re: [R] simple data manipulation question
?aggregate
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@imail.org
801.408.8111
> -Original Message-
> From: r-help-boun...@r-proje
ar
> Sent: Wednesday, December 09, 2009 5:51 PM
> To: r-help@r-project.org
> Subject: [R] simple data manipulation question
>
>
> Hi there
>
> I have a dataframe of a whole lot of variables
>
> lets say, one of my variables is gender
> how do I simply get a
9, 2009 5:51 PM
> To: r-help@r-project.org
> Subject: [R] simple data manipulation question
>
>
> Hi there
>
> I have a dataframe of a whole lot of variables
>
> lets say, one of my variables is gender
> how do I simply get an average of all other variables by gender?
- On Thu, 12/10/09, smu wrote:
> From: smu
> Subject: Re: [R] simple data manipulation question
> To: "dolar"
> Cc: r-help@r-project.org
> Date: Thursday, December 10, 2009, 1:45 AM
> for example:
>
> > d = data.frame(gender=c("m","f",&q
for example:
> d = data.frame(gender=c("m","f","unkown"), x=rnorm(300))
> tapply(d$x,d$gender,mean)
f munkown
0.0787628409 0.0940534765 -0.0005323276
regards,
stefan
On Wed, Dec 09, 2009 at 04:50:37PM -0800, dolar wrote:
>
> Hi there
>
> I have a dataframe o
Hi there
I have a dataframe of a whole lot of variables
lets say, one of my variables is gender
how do I simply get an average of all other variables by gender?
--
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