[R] How to show number in the %f format?

[David Winsemius]

On Sep 23, 2009, at 6:42 PM, Peng Yu wrote:

> On Wed, Sep 23, 2009 at 5:16 PM, David Winsemius <dwinsemius at comcast.net 
> > wrote:
>>
>> On Sep 23, 2009, at 5:58 PM, Peng Yu wrote:
>>
>>> Hi,
>>>
>>> I have the following matrix, which is printed %e format (in C's  
>>> way).
>>> I am wondering how make it be printed in %f format (in C's way)?
>>
>> ??"printf"  # scroll down to base package listings, the C function
>>
>> ?sprintf    # the s/r function
>
> I tried the following command. The column names are missing and the
> command is a little complicated. Is there any better solution?
>
>> t(apply(significant_analysis_results[,7:8],1,function(x){sprintf("%. 
>> 7f",x)}))

Why not apply to the column index?  ... rather than to the row and  
then transposing.

>          [,1]        [,2]
> Nab2      "0.0000019" "0.0000000"
> Rasal1    "0.0000248" "0.0000105"
> Ccndbp1   "0.0000001" "0.0002269"
> Svep1     "0.0000000" "0.0000000"
> Ppara     "0.0008219" "0.0000000"
> Pros1     "0.0000009" "0.0000000"
> Papss2    "0.0000000" "0.0000002"
> Hdac9     "0.0000000" "0.0000000"
> Adcyap1r1 "0.0000000" "0.0000000"
> Robo1     "0.0000000" "0.0000000"
> Sema3a    "0.0000000" "0.0000000"
> Rab9b     "0.0000110" "0.0000011"
> Tgfb3     "0.0000000" "0.0000000"
> Slc9a9    "0.0074608" "0.0000000"
> Creb5     "0.0000003" "0.0000000"
> Ccnd1     "0.0007869" "0.0000001"
> Pafah1b3  "0.0000000" "0.0000068"
> Tiam2     "0.0000000" "0.0000000"
> Etv5      "0.0000000" "0.0000000"
> Hcrtr2    "0.0000000" "0.0000166"
>
>
>>
>>>
>>> Regards,
>>> Peng
>>>
>>>> significant_analysis_results[,7:8]
>>>
>>>             pval(ki-wt)     pval(ko-wt)
>>> Nab2      1.913348979e-06 2.731944670e-09
>>> Rasal1    2.482254110e-05 1.054711084e-05
>>> Ccndbp1   6.307674516e-08 2.268947934e-04
>>> Svep1     0.000000000e+00 1.564526286e-12
>>> Ppara     8.218961690e-04 2.802202914e-13
>>> Pros1     8.787052919e-07 0.000000000e+00
>>> Papss2    0.000000000e+00 2.190819073e-07
>>> Hdac9     0.000000000e+00 8.881784197e-16
>>> Adcyap1r1 2.085731587e-11 1.998401444e-15
>>> Robo1     0.000000000e+00 0.000000000e+00
>>> Sema3a    4.903322193e-11 0.000000000e+00
>>> Rab9b     1.099629676e-05 1.116694168e-06
>>> Tgfb3     0.000000000e+00 0.000000000e+00
>>> Slc9a9    7.460784795e-03 1.552167950e-09
>>> Creb5     2.959174867e-07 8.973577437e-11
>>> Ccnd1     7.868573521e-04 1.460805570e-07
>>> Pafah1b3  1.576464070e-08 6.757446065e-06
>>> Tiam2     0.000000000e+00 0.000000000e+00
>>> Etv5      2.279731959e-12 0.000000000e+00
>>> Hcrtr2    1.258646520e-10 1.661509722e-05
>>>>
>>>> str(significant_analysis_results[,7:8])
>>>
>>> num [1:20, 1:2] 1.91e-06 2.48e-05 6.31e-08 0.00 8.22e-04 ...
>>> - attr(*, "dimnames")=List of 2
>>>  ..$ : chr [1:20] "Nab2" "Rasal1" "Ccndbp1" "Svep1" ...
>>>  ..$ : chr [1:2] "pval(ki-wt)" "pval(ko-wt)"
>>>
>>> ______________________________________________
>>> 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.
>>
>> David Winsemius, MD
>> Heritage Laboratories
>> West Hartford, CT
>>
>>
>
> ______________________________________________
> 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.

David Winsemius, MD
Heritage Laboratories
West Hartford, CT