[R] readxl, read_excel: how colon (:) is read ?

[Patrick Giraudoux]

This can be made using the TEXT (TEXTE in the French version) function 
of Excel, hence:

TEXT(M2;"HH:MM")

Changes the time into text, and it can be imported from R as wanted.



Le 01/04/2022 à 08:34, Patrick Giraudoux a écrit :
> Absolutely correct ! I checked in Excel and when I change the format 
> to "text", then I get in Excel the same fractional numbers as those 
> obtained importing text from R... Hence the issue comes from Excel 
> itself. Will find a way to change this format to text in Excel without 
> avoiding such conversion...
> Thanks Andrew !
>
> Le 01/04/2022 à 08:26, Andrew Simmons a écrit :
>> Probably (but not entirely sure), Excel is storing your text as a 
>> number of days, so 13:38 is a little more than half a day. Open your 
>> spreadsheet in excel and save those columns as text instead of times, 
>> that (should) fix your issue.
>>
>> On Fri, Apr 1, 2022, 02:12 Patrick Giraudoux 
>> <patrick.giraudoux using univ-fcomte.fr> wrote:
>>
>>     I have a unexpected behaviour reading times with colon from an Excel
>>     file, using the package readxl.
>>
>>     In an Excel sheet, I have a column with times in hours:minutes, e.g:
>>
>>     Arrival_time
>>     13:39
>>     13:51
>>
>>     When read from R with readxl::read_excel, this gives a tibble column
>>     with full date by defaut being the last day of 1899. OK. Why not,
>>     I know
>>     that POSIX variables are starting in 1900 after R doc (however I
>>     wonder
>>     why here the defaut is one day before January 1, 1900
>>
>>     > tmp$Arrival_time  [1] "1899-12-31 13:39:00 UTC" "1899-12-31
>>     13:51:00 UTC"
>>
>>     Well, this is not exactly what I want to. I do not care about the
>>     year
>>     and the day... Therefore I decided to import this column as "text"
>>     explicitely (in order to manage it within R then). And this is
>>     what I
>>     get now:
>>
>>     >
>>     read_excel("saisie_data_durban_rapaces_LPO.xlsx",sheet=2,col_types="text")
>>     > tmp$Arrival_time [1] "0.56875000000000009" "0.57708333333333328"
>>
>>     Can someone tell me what happens ?
>>
>>     I would really appreciate to understand the trick...
>>
>>
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>>
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>

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