file_info | R Documentation |
Provides information about data stored in file: columns, number of observations, range of timestamps.
file_info(dir, file)
dir |
character |
file |
character |
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.
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.
Enrico Schumann
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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