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Provides information about data stored in file: columns, number of observations, range of timestamps.
file_info(dir, file)
An object of type file_info, which is a
data.frame with information such as whether a
file exists, minimum and maximum timestamp, and more.
character
character
Enrico Schumann
Provide information, such as number of entries, of specified files.
It is recommended that code that uses the returned
information to alter or write tables, should explicitly
check whether a table exists (column exists in
the returned data.frame). For instance,
a value of NA for min.timestamp
would occur for a non-existing file, but also if the
file could not be read for some reason.
ts_table
ts <- ts_table(1:3, as.Date("2018-12-3") + 1:3, columns = "A")
d <- tempdir()
write_ts_table(ts, file = "temp", dir = d)
file_info(d, "temp")
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