dafishr (version 1.0.1)

vms_clean: Fixing dates and column names

Description

This function cleans raw Vessel Monitoring System, VMS, data column files, eliminate NULL values in coordinates, parse dates, and returns a data.frame.

Usage

vms_clean(path_to_data)

Value

A data.frame

Arguments

path_to_data

it can be a path to the file downloaded or the data object itself. If function is used with a path it adds a file column to the returning data.frame object that stores the name of the file as a reference.

Details

It takes a raw data file downloaded using the vms_download() function by specifying directly its path or by referencing a data.frame already stored as an R object. If path is used, column with the name of the raw file is conveniently added as future reference. It also split date into three new columns year, month, day, and retains the original date column. This function can be used with apply functions over a list of files or it can be paralleled using furrr functions.

Examples

# Using sample dataset, or a data.frame already stored as an object
# It is possible to use a path directly as argument

data("sample_dataset")
cleaned_vms <- vms_clean(sample_dataset)
head(cleaned_vms)