R help - Sep 2008 - adding labels to tapply results

Hi,

How do I get labels onto the output from tapply?  I need the labels to merge
the output with another data frame.  Thanks.

eric

d <- data.frame(cbind(x=1:3, y=1:10))
a <- with(d, tapply(y, x, sum))

	[[alternative HTML version deleted]]

eric lee <ericlee100 <at> gmail.com> writes:
> How do I get labels onto the output from tapply?  I need the labels to
merge
> the output with another data frame.  Thanks.
> 
> eric
> 
> d <- data.frame(cbind(x=1:3, y=1:10))
> a <- with(d, tapply(y, x, sum))
> 
By taking the warning seriously. 
> d <- data.frame(cbind(x=1:3, y=1:10))
Warning message:
In cbind(x = 1:3, y = 1:10) :
  number of rows of result is not a multiple of vector length (arg 1)

 d <- data.frame(cbind(x=101:110, y=1:10))
 a <- with(d, tapply(y, x, sum))
 a

#101 102 103 104 105 106 107 108 109 110 
#  1   2   3   4   5   6   7   8   9  10 
 
Dieter

Try using aggregate instead of tapply.  If that does not answer your question,
then try restating it or showing what your desired output would look like (see
the posting guide referenced at the bottom of every post).

--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of eric lee
> Sent: Monday, September 29, 2008 6:46 AM
> To: r-help at r-project.org
> Subject: [R] adding labels to tapply results
>
> Hi,
>
> How do I get labels onto the output from tapply?  I need the labels to
> merge
> the output with another data frame.  Thanks.
>
> eric
>
> d <- data.frame(cbind(x=1:3, y=1:10))
> a <- with(d, tapply(y, x, sum))
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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
> and provide commented, minimal, self-contained, reproducible code.