[R] How to fix the format in write.csv

[Bert Gunter]

ChangJiang:

Open the .csv file with Notepad or other plain vanilla text processor,
NOT EXCEL. You will find that the columns are text. Excel
automatically converts them to dates. Read Excel's docs or get help
from someone to learn how to convert the dates back to text.

-- Bert



Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
H. Gilbert Welch




On Fri, May 2, 2014 at 12:35 PM, ChangJiang Xu
<changjiang.h.xu at gmail.com> wrote:
> Thanks. I still didn't get the solution. For example, I have a data frame,
> called temp
>> temp
>   Chr Ref Var     AFF    UNAFF AFF.test     pvalue
> 1  10   A   G  2/1/24    0/0/190        5/49  2.429e-09
> 2  18   G   A  1/9/17  0/23/167       11/43  2.484e-04
> 3   1   G   A  2/2/22    0/8/176         6/46  4.293e-04
> 4  11   T   G  1/1/25    0/2/188          3/51 1.193e-03
> 5   2   A   T 1/10/16   38/90/60       12/42  2.220e-03
> 6   3   G   A 1/16/10  8/49/133        18/36 4.549e-03
>
> Then I want to write a csv file using R function write.csv, as follows:
>> write.csv(temp, file="temp.csv", row.names = FALSE)
>
> and the csv file, temp.csv, looks like the below, not same as original data
> Chr    Ref    Var    AFF           UNAFF        AFF.test    pvalue
> 10        A    G    02/01/2024    0/0/190        May-49        2.43E-09
> 18        G    A    01/09/2017    0/23/167      Nov-43        0.0002484
> 1          G    A    02/02/2022    0/8/176        Jun-46        0.0004293
> 11         T    G    01/01/2025    0/2/188        Mar-51        0.001193
> 2          A    T    01/10/2016    38/90/60       Dec-42        0.00222
> 3          G    A    1/16/10        8/49/133       18/36          0.004549
>
>
> On Fri, May 2, 2014 at 3:06 PM, Bert Gunter <gunter.berton at gene.com> wrote:
>>
>> Read your Excel documentation. AFAIK, R just writes text files -- you
>> need to tell Excel how to read them in.
>>
>> Cheers,
>> Bert
>>
>> Bert Gunter
>> Genentech Nonclinical Biostatistics
>> (650) 467-7374
>>
>> "Data is not information. Information is not knowledge. And knowledge
>> is certainly not wisdom."
>> H. Gilbert Welch
>>
>>
>>
>>
>> On Fri, May 2, 2014 at 11:34 AM, ChangJiang Xu
>> <changjiang.h.xu at gmail.com> wrote:
>> > By dafault, write.csv will change the characters such as "5/38" as a
>> > date
>> > "May-38". How can I not change the format?
>> > Thanks.
>> >
>> > ChangJiang
>> >
>> >         [[alternative HTML version deleted]]
>> >
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>> > and provide commented, minimal, self-contained, reproducible code.
>
>