Setting Number of Displayed Digits

[Rich Shepard]

   Some chemicals have concentrations at or below the method detection limit
(MDL; 'less-thans') of 0.005 mg/L. When I look at the data frame that is how
the concentration is displayed. But, when I ask for a summary() of that data
frame column only 0 is displayed.

   How can I adjust the number of digits displayed by functions such as
summary()?

Rich

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[Duncan Murdoch-2]

On 12-08-07 5:30 PM, Rich Shepard wrote:
>     Some chemicals have concentrations at or below the method detection limit
> (MDL; 'less-thans') of 0.005 mg/L. When I look at the data frame that is how
> the concentration is displayed. But, when I ask for a summary() of that data
> frame column only 0 is displayed.
>
>     How can I adjust the number of digits displayed by functions such as
> summary()?
>

See ?summary.

Duncan Murdoch

> Rich
>
> ______________________________________________
> [hidden email] 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.
>

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[Rui Barradas]

Hello,

function summary.data.frame does have a 'digits' argument with a default
set to
max(3, getOption("digits")-3)

If you need more digits in your summary, call

summary(object, digits = getOption("digits"))

Hope this helps,

Rui Barradas

Em 07-08-2012 22:30, Rich Shepard escreveu:

>   Some chemicals have concentrations at or below the method detection
> limit
> (MDL; 'less-thans') of 0.005 mg/L. When I look at the data frame that
> is how
> the concentration is displayed. But, when I ask for a summary() of
> that data
> frame column only 0 is displayed.
>
>   How can I adjust the number of digits displayed by functions such as
> summary()?
>
> Rich
>
> ______________________________________________
> [hidden email] 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.

______________________________________________
[hidden email] 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.

[Michael Weylandt]

Can you provide a reproducible example: see, e.g., this site for how to do so:


http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example

Incidentally, I don't believe I can replicate your problem:

> x <- data.frame(conc = sample(c(100, 1,2,3, 0.005, 0.0005, 0.00002), 250, TRUE))
> summary(x)
      conc
 Min.   :  0.00002
 1st Qu.:  0.00050
 Median :  1.00000
 Mean   : 14.88871
 3rd Qu.:  3.00000
 Max.   :100.00000

But perhaps you should set

options(digits = 10)

or so

Michael

On Tue, Aug 7, 2012 at 4:30 PM, Rich Shepard <[hidden email]> wrote:

>   Some chemicals have concentrations at or below the method detection limit
> (MDL; 'less-thans') of 0.005 mg/L. When I look at the data frame that is how
> the concentration is displayed. But, when I ask for a summary() of that data
> frame column only 0 is displayed.
>
>   How can I adjust the number of digits displayed by functions such as
> summary()?
>
> Rich
>
> ______________________________________________
> [hidden email] 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.

______________________________________________
[hidden email] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
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and provide commented, minimal, self-contained, reproducible code.

[David Winsemius]

On Aug 7, 2012, at 2:30 PM, Rich Shepard wrote:

>  Some chemicals have concentrations at or below the method detection  
> limit
> (MDL; 'less-thans') of 0.005 mg/L. When I look at the data frame  
> that is how
> the concentration is displayed. But, when I ask for a summary() of  
> that data
> frame column only 0 is displayed.
>
>  How can I adjust the number of digits displayed by functions such as
> summary()?

Before you hit "Send" on a post you should check to see that you have  
included data and  code. Otherwise you are asking us to just guess at  
what you did.

--

David Winsemius, MD
Alameda, CA, USA

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[arun kirshna]

HI,
formatC() may work for you.
 summary(x,digits=5)
#may not work here.

I tried this within a list.  For some of the list members, this is not working.
summary(list12[[5]],digits=max(7))
  # Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
  #  1.0     1.0     2.5     3.2     5.0     7.0

 formatC(summary(list12[[5]]),format="f",digits=7)
#     Min.   1st Qu.    Median      Mean   3rd Qu.      Max.
#1.0000000 1.0000000 2.5000000 3.2000000 5.0000000 7.0000000

A.K.