Timestamps skip minutes after download

[yannikbuhl]

Hi there, I am using your great package for downloading wind data for a bunch of weather stations. Everything is working fine, however, the list output of dataDWD does only provide the time of the full hour. That means, the preciseness of the 10 minutes resolution is kind of lost for analysis. Am I doing something wrong? I checked the documentation of dataDWD and also the source code and could not find a clue as to wheter I have misspecified something. My output looks like this (the data type inside the list is double (S3: POSIXct, POSIXt).

res1[["10_minutes_wind_now_10minutenwerte_wind_00011_now_2"]][["MESS_DATUM"]]

"2020-02-25 00:00:00 GMT" 
"2020-02-25 00:00:00 GMT" 
"2020-02-25 00:00:00 GMT" 
"2020-02-25 00:00:00 GMT"
"2020-02-25 00:00:00 GMT" 
"2020-02-25 00:00:00 GMT" 
"2020-02-25 01:00:00 GMT" 
"2020-02-25 01:00:00 GMT"
"2020-02-25 01:00:00 GMT" 
"2020-02-25 01:00:00 GMT" 
"2020-02-25 01:00:00 GMT" 
"2020-02-25 01:00:00 GMT"
...

This is my code:

download <- selectDWD(id = 11, res = "10_minutes", outvec = TRUE, var = "wind", per = "now")
res1 <- dataDWD(file = download, dir = here::here("wetter"), force = TRUE, quiet = TRUE)

Of course, I could just add the minutes manually after downloading. But I first wanted to make sure there is no other way of doing so.

[brry]

Sounds like a bug on my side in readDWD, similar to #12.
I'll check it out and probably have a fix in the next few hours

[brry]

Hm, it works fine for me. I split up downloading and reading, but doing that in one step works fine as well.

url <- selectDWD(id=11, res="10_minutes", var="wind", per="now")
file <- dataDWD(url, dir=tempdir(), read=FALSE)
wind <- readDWD(file)
str(wind$MESS_DATUM)
# POSIXct[1:60], format: "2020-02-25 00:00:00" "2020-02-25 00:10:00" "2020-02-25 00:20:00" "2020-02-25 00:30:00" "2020-02-25 00:40:00" "2020-02-25 00:50:00" ...
head(wind$MESS_DATUM)
# "2020-02-25 00:00:00 GMT" "2020-02-25 00:10:00 GMT" "2020-02-25 00:20:00 GMT" "2020-02-25 00:30:00 GMT" "2020-02-25 00:40:00 GMT" "2020-02-25 00:50:00 GMT"

Does packageVersion("rdwd") return 1.3.1?

[brry]

The last rdwd version 1.2.0 (2019-10-28) up to one week ago on CRAN had exactly the error you have, so I assume it will be enough to run install.packages("rdwd") and re-run your code.

[yannikbuhl]

Thank you so much! Yes, the package update did the trick. I had found the bug meanwhile in readDWD.data and now I can see the fix, (nch == 12) was missing.