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

[Peng Yu]

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)}))
          [,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)"
>>
>> ______________________________________________
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>> 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
>
>