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

[Andrew Simmons]

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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