This set of generics is similar to output_column in that it
converts columns to a form suitable to writing.
mudata_prepare_column in combination with is
intended to be opposites with mudata_parse_column except for
date/time vectors that are not in UTC (mudata_parse_column assumes UTC,
and mudata_prepare_column always converts to UTC with a message).
mudata_prepare_column(x, format = NA, ...) mudata_prepare_tbl(x, format = NA, ...) # S3 method for default mudata_prepare_tbl(x, format = NA, ...) # S3 method for tbl mudata_prepare_tbl(x, format = NA, ...) # S3 method for data.frame mudata_prepare_tbl(x, format = NA, ...) # S3 method for default mudata_prepare_column(x, format = NA, ...) # S3 method for POSIXt mudata_prepare_column(x, format = NA, ...) # S3 method for sfc mudata_prepare_column(x, format = NA, ...) # S3 method for hms mudata_prepare_column(x, format = NA, ...) # S3 method for list mudata_prepare_column(x, format = NA, ...) mudata_parse_column(x, type_str = NA_character_, ...) mudata_parse_tbl(x, type_str = NA_character_, ...)
| x | A an object |
|---|---|
| format | csv, json, or NA for unknown, |
| ... | Passed to methods |
| type_str | A type string, generated by the internal |
An atomic vector
Type strings are currently internal, and are in the columns table in the "type" column. They are usually one of "character", "date", "datetime", "double", "integer", "json", and "wkt". They can also contain simple arguments, like "wkt(epsg=4326)" (actually, "wkt" is the only type string that should have arguments). You should generally not mess with these (in fact, the "type" column in the coluns table is overwritten right before read by default, so it is hard to mess this up).