[R] Formatting numeric values in a data frame

[Pele]

Jim - example is perfect - many thanks!!!

Philipp - many thanks for your example also.



jholtman wrote:
> 
> 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
> 
> What is the problem that you are trying to solve?
> 
> ______________________________________________
> 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.
> 
> 

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