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Pele

2009-Feb-25 21:19 UTC

[R] Formatting numeric values in a data frame

Hi R users,

I have a data frame that contains 10K obs and 200 variables 
where I am trying to format the numeric columns to look
like the output table below (format to 2 decimal places) but I am 
having no luck.. Can someone tell me the best way to 
accomplist this? 

Thanks in advance for any help!

 str(ad.test)
'data.frame':   10,000 obs. of  200 variables:
 $ ID             : Factor w/ ..................
 $ x1             : num  0.1123334 0.4778966..........
 $ x2             : num  0.00002 0.00002..............
 $ x3             : num  12.33338 9.44446.............
 ===================================================Data.frame....
ID		x1			         x2			        x3
a1		0.0123334		        0.000020000		12.33338
b3		0.477896366		0.000020000		9.44446
c1		0.477896366		0.000020000		9.44446
d5		0.477896366		0.000020000		9.44446
e1		0.477896366		0.000020000		9.44446
f2		0.477896366		0.000020000		9.44446
g6		0.333333333		0.000020000		9.44446
h8		0.333333333		0.000020000		9.44446
i2		0.333333333		0.000020000		9.44446
k2		0.333333333		0.000020000		9.44446
			
========================================================
Output:

ID		x1			x2			x3
a1		0.01			0.00			12.33
b3		0.48			0.00			9.44
c1		0.48			0.00			9.44
d5		0.48			0.00			9.44
e1		0.48			0.00			9.44
f2		0.48			0.00			9.44
g6		0.33			0.00			9.44
h8		0.33			0.00			9.44
i2		0.33			0.00			9.44
k2		0.33			0.00			9.44
-- 
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Philipp Pagel

2009-Feb-25 21:36 UTC

head link

[R] Formatting numeric values in a data frame

On Wed, Feb 25, 2009 at 01:19:36PM -0800, Pele wrote:> 
> Hi R users,
> 
> I have a data frame that contains 10K obs and 200 variables 
> where I am trying to format the numeric columns to look
> like the output table below (format to 2 decimal places) but I am 
> having no luck.. Can someone tell me the best way to 
> accomplist this? 
format() will do tht for you:
> foo <- data.frame(a=rnorm(10), b=rnorm(10))
> format(foo, digits=1)a     b
1  -0.12  1.28
2  -0.21 -0.46
3   0.09  0.45
4  -0.58 -0.88
5  -0.04 -0.20
6   0.03 -0.43
7   0.65 -1.53
8   0.39  0.81
9   0.69  0.09
10 -0.61 -1.15


Note that here we got 2 instead of the requested 1 significant digit
because that would have set some values to 0.0. More in the manual
page.

cu
	Philipp

-- 
Dr. Philipp Pagel
Lehrstuhl f?r Genomorientierte Bioinformatik
Technische Universit?t M?nchen
Wissenschaftszentrum Weihenstephan
85350 Freising, Germany
http://mips.gsf.de/staff/pagel

jim holtman

2009-Feb-25 21:39 UTC

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[R] Formatting numeric values in a data frame

This might do what you want:
> x <- read.table(textConnection("ID              x1                 
x2                             x3+ a1              0.0123334                       0.000020000
   12.33338
+ b3              0.477896366             0.000020000             9.44446
+ c1              0.477896366             0.000020000             9.44446
+ d5              0.477896366             0.000020000             9.44446
+ e1              0.477896366             0.000020000             9.44446
+ f2              0.477896366             0.000020000             9.44446
+ g6              0.333333333             0.000020000             9.44446
+ h8              0.333333333             0.000020000             9.44446
+ i2              0.333333333             0.000020000             9.44446
+ k2              0.333333333             0.000020000
9.44446"), header=TRUE)> closeAllConnections()
> x.c <- x  # make a copy
> x.c[] <- lapply(x.c, function(.col){+     if (is.numeric(.col)) return(sprintf("%.2f", .col))
+     else return(.col)
+ })>
> x.c   ID   x1   x2    x3
1  a1 0.01 0.00 12.33
2  b3 0.48 0.00  9.44
3  c1 0.48 0.00  9.44
4  d5 0.48 0.00  9.44
5  e1 0.48 0.00  9.44
6  f2 0.48 0.00  9.44
7  g6 0.33 0.00  9.44
8  h8 0.33 0.00  9.44
9  i2 0.33 0.00  9.44
10 k2 0.33 0.00  9.44>

On Wed, Feb 25, 2009 at 4:19 PM, Pele <drdionc at yahoo.com>
wrote:>
> Hi R users,
>
> I have a data frame that contains 10K obs and 200 variables
> where I am trying to format the numeric columns to look
> like the output table below (format to 2 decimal places) but I am
> having no luck.. Can someone tell me the best way to
> accomplist this?
>
> Thanks in advance for any help!
>
> ?str(ad.test)
> 'data.frame': ? 10,000 obs. of ?200 variables:
> ?$ ID ? ? ? ? ? ? : Factor w/ ..................
> ?$ x1 ? ? ? ? ? ? : num ?0.1123334 0.4778966..........
> ?$ x2 ? ? ? ? ? ? : num ?0.00002 0.00002..............
> ?$ x3 ? ? ? ? ? ? : num ?12.33338 9.44446.............
> ?===================================================> Data.frame....
> ID ? ? ? ? ? ? ?x1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? x2 ? ? ? ? ? ? ? ? ? ? ? ?
? ? x3
> a1 ? ? ? ? ? ? ?0.0123334 ? ? ? ? ? ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ?
12.33338
> b3 ? ? ? ? ? ? ?0.477896366 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
> c1 ? ? ? ? ? ? ?0.477896366 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
> d5 ? ? ? ? ? ? ?0.477896366 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
> e1 ? ? ? ? ? ? ?0.477896366 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
> f2 ? ? ? ? ? ? ?0.477896366 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
> g6 ? ? ? ? ? ? ?0.333333333 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
> h8 ? ? ? ? ? ? ?0.333333333 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
> i2 ? ? ? ? ? ? ?0.333333333 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
> k2 ? ? ? ? ? ? ?0.333333333 ? ? ? ? ? ? 0.000020000 ? ? ? ? ? ? 9.44446
>
> ========================================================>
> Output:
>
> ID ? ? ? ? ? ? ?x1 ? ? ? ? ? ? ? ? ? ? ?x2 ? ? ? ? ? ? ? ? ? ? ?x3
> a1 ? ? ? ? ? ? ?0.01 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?12.33
> b3 ? ? ? ? ? ? ?0.48 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> c1 ? ? ? ? ? ? ?0.48 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> d5 ? ? ? ? ? ? ?0.48 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> e1 ? ? ? ? ? ? ?0.48 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> f2 ? ? ? ? ? ? ?0.48 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> g6 ? ? ? ? ? ? ?0.33 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> h8 ? ? ? ? ? ? ?0.33 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> i2 ? ? ? ? ? ? ?0.33 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> k2 ? ? ? ? ? ? ?0.33 ? ? ? ? ? ? ? ? ? ?0.00 ? ? ? ? ? ? ? ? ? ?9.44
> --
> View this message in context:
http://www.nabble.com/Formatting-numeric-values-in-a-data-frame-tp22212031p22212031.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.
>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

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