R help - Aug 2011 - How to get the descriptive statistic of the whole dataframe?

Hi all:
If I have a dataframe of N columns.If I wanna get the min(or max,or
mean...etc)of the whole dataframe,how to do it quickly?
What I can do is only:
min(data[,1:ncol(data)])

Any other suggestion?

Thanks!

best

	[[alternative HTML version deleted]]

look into the *apply series of functions. In your case

apply(name.of.your.data.frame,2,min)

or 

apply(name.of.your.data.frame,2,max)

will do. You can also put any summary function to your liking instead of
min/max.

Best,
Daniel


Lao Meng wrote:
> 
> Hi all:
> If I have a dataframe of N columns.If I wanna get the min(or max,or
> mean...etc)of the whole dataframe,how to do it quickly?
> What I can do is only:
> min(data[,1:ncol(data)])
> 
> Any other suggestion?
> 
> Thanks!
> 
> best
> 
> 	[[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.
> 
--
View this message in context:
http://r.789695.n4.nabble.com/How-to-get-the-descriptive-statistic-of-the-whole-dataframe-tp3751857p3752007.html
Sent from the R help mailing list archive at Nabble.com.

Hi
> 
> look into the *apply series of functions. In your case
> 
> apply(name.of.your.data.frame,2,min)
> 
> or 
> 
> apply(name.of.your.data.frame,2,max)
> 
> will do. You can also put any summary function to your liking instead of
> min/max.
And summary has its own data frame method so simply

summary(name.of.your.data.frame)

There is also fivenum function and more elaborated describe in Hmisc I 
believe :-)

Regards
Petr
> 
> Best,
> Daniel
> 
> 
> Lao Meng wrote:
> > 
> > Hi all:
> > If I have a dataframe of N columns.If I wanna get the min(or max,or
> > mean...etc)of the whole dataframe,how to do it quickly?
> > What I can do is only:
> > min(data[,1:ncol(data)])
> > 
> > Any other suggestion?
> > 
> > Thanks!
> > 
> > best
> > 
> >    [[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.
> > 
> 
> --
> View this message in context: http://r.789695.n4.nabble.com/How-to-get-
> the-descriptive-statistic-of-the-whole-dataframe-tp3751857p3752007.html
> Sent from the R help mailing list archive at Nabble.com.
> 
> ______________________________________________
> 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.

At 10:31 AM +0200 8/18/11, Petr PIKAL wrote:
>Hi
>
>>
>>  look into the *apply series of functions. In your case
>>
>>  apply(name.of.your.data.frame,2,min)
>>
>>  or
>>
>>  apply(name.of.your.data.frame,2,max)
>>
>>  will do. You can also put any summary function to your liking instead
of
>>  min/max.
>
>And summary has its own data frame method so simply
>
>summary(name.of.your.data.frame)
>
>There is also fivenum function and more elaborated describe in Hmisc I
>believe :-)

There are at least 3 different describe functions, all useful, but 
with somewhat different output

describe (psych)
describe (Hmisc)
describe (prettyR)

One of these will probably do just what you want.

Bill

>
>Regards
>Petr
>
>>
>>  Best,
>>  Daniel
>>
>>
>>  Lao Meng wrote:
>>  >
>>  > Hi all:
>>  > If I have a dataframe of N columns.If I wanna get the min(or
max,or
>>  > mean...etc)of the whole dataframe,how to do it quickly?
>>  > What I can do is only:
>>  > min(data[,1:ncol(data)])
>>  >
>>  > Any other suggestion?
>>  >
>>  > Thanks!
>>  >
>>  > best
>>  >
>>  >    [[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.
>>  >
>>
>  > --
-- 
William Revelle		http://personality-project.org/revelle.html
Professor			http://personality-project.org
Department of Psychology             http://www.wcas.northwestern.edu/psych/
Northwestern University	http://www.northwestern.edu/
Use R for psychology                       http://personality-project.org/r
It is 6 minutes to midnight	http://www.thebulletin.org