[R] data frame usage

[John Kane]

I think I also misunderstood. It sounds like you want
to subset the data set. 

Try
aa <- subset(x x$label == "xxx")

--- Bernd Jagla <baj2107 at columbia.edu> wrote:

> No, I just want to the values for one class nothing
> applied to them.
> So for example tapply(x$val, x$label, hist) gives me
> all kind of stats that
> can be used for plotting the histogram. But I want
> to plot the actual
> histogram for one class. 
> I guess it would be easiest to take your construct
> and just "echo" the
> values for a specific class.
> I hope you understand better what I mean....
> 
> Thanks again,
> 
> Bernd
> 
> |-----Original Message-----
> |From: Henrique Dallazuanna
> [mailto:wwwhsd at gmail.com]
> |Sent: Thursday, October 25, 2007 1:34 PM
> |To: Bernd Jagla
> |Cc: r-help at r-project.org
> |Subject: Re: [R] data frame usage
> |
> |Yes, or
> |
> | tapply(x$val, x$label, summary)[[1]]
> |
> |for the first class.
> |
> |On 25/10/2007, Bernd Jagla <baj2107 at columbia.edu>
> wrote:
> |
> |	Wow, that easy...
> |	And how can get only the values for a specific
> class?
> |
> |	Like tapply(x$val, x$label, ?echo?)$class1
> |
> |	What should echo be?
> |
> |	Thanks,
> |	B
> |
> |	|-----Original Message-----
> |	|From: Henrique Dallazuanna
> [mailto:wwwhsd at gmail.com]
> |	|Sent: Thursday, October 25, 2007 1:15 PM
> |	|To: Bernd Jagla
> |	|Cc: r-help at r-project.org
> |	|Subject: Re: [R] data frame usage
> |	|
> |	|Hi,
> |	|
> |	|tapply(x$val, x$label, summary)
> |	|
> |	|
> |	|
> |	|On 25/10/2007, Bernd Jagla <
> baj2107 at columbia.edu> wrote:
> |	|
> |	|       Hi,
> |	|       I am new to R and couldn't find any
> information on how to
> |handle my
> |	|table
> |	|       data that I just read in the way I want to
> use it..
> |	|
> |	|       I read in a table from a file:
> |	|       x <- read.delim("filenam", header=TRUE)
> |	|
> |	|       one column (x$label) hold the class
> labels. Another holds
> |some
> |	values
> |	|       (x$val).
> |	|       I want to calculate summary statistics for
> different
> classes.
> |	|
> |	|       How would I do this?
> |	|
> |	|       Thanks,
> |	|
> |	|       Bernd
> |	|
> |	|      
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> |	|
> |	|
> |	|
> |	|
> |	|--
> |	|Henrique Dallazuanna
> |	|Curitiba-Paraná-Brasil
> |	|25° 25' 40" S 49° 16' 22" O
> |
> |
> |
> |
> |
> |
> |--
> |Henrique Dallazuanna
> |Curitiba-Paraná-Brasil
> |25° 25' 40" S 49° 16' 22" O
> 
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> reproducible code.
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