[R] Data formart

[Amos B. Elberg]

The code changes a single row; that's why I said you'd have to adapt it to your application. 


> On Oct 9, 2014, at 3:10 AM, Frederic Ntirenganya <ntfredo at gmail.com> wrote:
> 
> Hi Amos,
> 
> This approach gives a column of NA. 
> 
>> On Wed, Oct 8, 2014 at 10:20 PM, Amos B. Elberg <amos.elberg at gmail.com> wrote:
>> You can adapt:   format(as.Date(paste(Year, sep = "-", ifelse(Year %% 4 == 0, Start, ifelse(Start > 59, Start - 1, Start))), "%Y-%j"), "%b %d”)
>> 
>> But 60% of the dates in your data.frame will then be wrong.  
>> 
>> 
>> From: Frederic Ntirenganya <ntfredo at gmail.com>
>> Reply: Frederic Ntirenganya <ntfredo at gmail.com>>
>> Date: October 8, 2014 at 9:38:34 AM
>> To: r-help at r-project.org <r-help at r-project.org>>
>> Subject:  [R] Data formart 
>> 
>>> Dear All, 
>>> 
>>> Change the format of the start and end columns so that data appear as the 
>>> day of the year. For instance: Apr 24 rather than 115. 
>>> 
>>> The idea is that I want the non=leap years to be 366 days instead of being 
>>> 365 days. ie. Each year must have 366 days. for example: in the column 
>>> Start2, Apr 18 will be Apr 17. 
>>> 
>>> > head(Samaru) 
>>> Year Start End Length Start2 End2 
>>> 1 1930 108 288 180 Apr 18 Oct 15 
>>> 2 1931 118 288 170 Apr 28 Oct 15 
>>> 3 1932 115 295 180 Apr 24 Oct 21 
>>> 4 1933 156 294 138 Jun 05 Oct 21 
>>> 5 1934 116 291 175 Apr 26 Oct 18 
>>> 6 1935 134 288 154 May 14 Oct 15 
>>> 
>>> Any idea is welcome. Thamks!!!! 
>>> -- 
>>> Frederic Ntirenganya 
>>> Maseno University, 
>>> Kenya. 
>>> Mobile:(+254)718492836 
>>> Email: fredo at aims.ac.za 
>>> https://sites.google.com/a/aims.ac.za/fredo/ 
>>> 
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>>> 
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>>> and provide commented, minimal, self-contained, reproducible code.
> 
> 
> 
> -- 
> Frederic Ntirenganya
> Maseno University,
> Kenya.
> Mobile:(+254)718492836
> Email: fredo at aims.ac.za
> https://sites.google.com/a/aims.ac.za/fredo/

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