R help - Sep 2010 - Extracting bins and frequencies from frequency table

Dear R users,

I would like to great a frequency table from raw data and then access
the classes/bins and
their respective frequencies separately. Here the code to create the
frequency tables:


x1 <- c(1,5,1,1,2,2,3,4,5,3,2,3,6,4,3,8)
t1 <- table(x1)
print(t1[1])

Its easy to plot this, but how do I actually access the frequencies
alone and the bins alone?
Basically I am looking to get:

bins <- c(1, 2, 3, 4, 5, 6, 8)
freq <- c(3, 3, 4, 2, 2, 1, 1)

When running

print(t1[1])

I only get one pair. It seems to be organized that way. Is there a
better way? Perhaps 'table' is not the right approach?

Thanks a lot,
Ralf

Hi Ralf

try hist()

obl<-hist(x1, plot=FALSE)

it returns midpoints and their respective frequencies. You can specify the
breakpoints as well.

?hist

for details.

Mike

On Wed, Sep 22, 2010 at 1:44 PM, Ralf B <ralf.bierig@gmail.com> wrote:
> Dear R users,
>
> I would like to great a frequency table from raw data and then access
> the classes/bins and
> their respective frequencies separately. Here the code to create the
> frequency tables:
>
>
> x1 <- c(1,5,1,1,2,2,3,4,5,3,2,3,6,4,3,8)
> t1 <- table(x1)
> print(t1[1])
>
> Its easy to plot this, but how do I actually access the frequencies
> alone and the bins alone?
> Basically I am looking to get:
>
> bins <- c(1, 2, 3, 4, 5, 6, 8)
> freq <- c(3, 3, 4, 2, 2, 1, 1)
>
> When running
>
> print(t1[1])
>
> I only get one pair. It seems to be organized that way. Is there a
> better way? Perhaps 'table' is not the right approach?
>
> Thanks a lot,
> Ralf
>
> ______________________________________________
> R-help@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<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>
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Ralf -
    Try

bins = as.numeric(names(t1))
freqs = as.vector(t1)

 					- Phil Spector
 					 Statistical Computing Facility
 					 Department of Statistics
 					 UC Berkeley
 					 spector at stat.berkeley.edu




On Wed, 22 Sep 2010, Ralf B wrote:
> Dear R users,
>
> I would like to great a frequency table from raw data and then access
> the classes/bins and
> their respective frequencies separately. Here the code to create the
> frequency tables:
>
>
> x1 <- c(1,5,1,1,2,2,3,4,5,3,2,3,6,4,3,8)
> t1 <- table(x1)
> print(t1[1])
>
> Its easy to plot this, but how do I actually access the frequencies
> alone and the bins alone?
> Basically I am looking to get:
>
> bins <- c(1, 2, 3, 4, 5, 6, 8)
> freq <- c(3, 3, 4, 2, 2, 1, 1)
>
> When running
>
> print(t1[1])
>
> I only get one pair. It seems to be organized that way. Is there a
> better way? Perhaps 'table' is not the right approach?
>
> Thanks a lot,
> Ralf
>
> ______________________________________________
> 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.
>

Try this:

as.data.frame(table(x1))

On Wed, Sep 22, 2010 at 3:44 PM, Ralf B <ralf.bierig@gmail.com> wrote:
> Dear R users,
>
> I would like to great a frequency table from raw data and then access
> the classes/bins and
> their respective frequencies separately. Here the code to create the
> frequency tables:
>
>
> x1 <- c(1,5,1,1,2,2,3,4,5,3,2,3,6,4,3,8)
> t1 <- table(x1)
> print(t1[1])
>
> Its easy to plot this, but how do I actually access the frequencies
> alone and the bins alone?
> Basically I am looking to get:
>
> bins <- c(1, 2, 3, 4, 5, 6, 8)
> freq <- c(3, 3, 4, 2, 2, 1, 1)
>
> When running
>
> print(t1[1])
>
> I only get one pair. It seems to be organized that way. Is there a
> better way? Perhaps 'table' is not the right approach?
>
> Thanks a lot,
> Ralf
>
> ______________________________________________
> R-help@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.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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