Read regular dwd data.
Intended to be called via readDWD().
readDWD.data(
file,
fread = FALSE,
varnames = FALSE,
format = NA,
tz = "GMT",
hr = 0,
quiet = rdwdquiet(),
...
)data.frame
Name of file on harddrive, like e.g. DWDdata/daily_kl_recent_tageswerte_KL_03987_akt.zip
Logical: read faster with data.table::fread?
When reading many large historical files, speedup is significant.
When called from readDWD(), fread=NA can also be used, which means
TRUE if R package data.table and system command unzip are available.
Hint for Windows users: unzip comes with Rtools.
See https://bookdown.org/brry/rdwd/fread.html
DEFAULT: FALSE
Logical (vector): add a short description to the DWD variable
abbreviations in the column names?
E.g. change FX,TNK to FX.Windspitze,TNK.Lufttemperatur_Min,
see newColumnNames().
DEFAULT: FALSE (for backwards compatibility)
Char (vector): Format passed to as.POSIXct() (see strptime())
to convert the date/time column to POSIX time format.
If NULL, no conversion is performed (date stays a factor).
If NA, readDWD tries to find a suitable format based
on the number of characters. DEFAULT: NA
Char (vector): time zone for as.POSIXct().
"" is the current time zone, and "GMT" is UTC (Universal Time,
Coordinated). DEFAULT: "GMT"
Integer code to automatically merge historical and recent datasets.
If set, readDWD returns a data.frame instead of a list.
If multiple historical files are present,
the longest date range (per file name) is used.
This is not actually used in readDWD.data, but in readDWD().
0 (default): ignore this argument
1: sort by hr (if given) + merge
2: also remove duplicated dates from recent
3: also remove columns QN3,QN4,eor
4: also remove column STATIONS_ID
DEFAULT: 0
Suppress empty file warnings?
DEFAULT: FALSE through rdwdquiet()
Further arguments passed to read.table() or data.table::fread()
Berry Boessenkool, berry-b@gmx.de
readDWD(), Examples in dataDWD()