Package 'ColumbusGPS'

Adjust datetime

Description

Adjust datetime string from UTC to pacific timezone or vice versa.

Usage

adjust_datetime(datetime_str, type = c("to_pacific", "to_utc"))

Arguments

datetime_str	Datetime string in YYYY-MM-DD HH:MM:SS format
type	Direction for timezone adjustment: to_pacific or to_utc

Examples

# Daylight Savings Time started on 2022-11-06
adjust_datetime(c("2022-11-05 12:00:00", "2022-11-07 12:00:00"), "to_pacific")

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Get sample date

Description

Get the sample date from datetime strings based on threshold time (to accommodate sampling that extends beyond midnight).

Usage

get_sample_date(datetime_str, threshold_time = "05:00:00")

Arguments

datetime_str	Datetime string in the format YYYY-MM-DD HH:MM:SS
threshold_time	Time string in the format HH:MM:SS

Examples

get_sample_date(c("2023-01-05 23:00:00", "2023-01-06 03:00:00", "2023-01-06 06:00:00"))

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Prep data file

Description

Prep Columbus GPS data file.

Usage

prep_data_file(data_file)

Arguments

data_file

Path to Columbus GPS data file

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Prep datetime

Description

Combine YYMMDD date and HHMMSS time into YYYY-MM-DD HH:MM:SS datetime.

Usage

prep_datetime(date_str, time_str)

Arguments

date_str	Date string in YYMMDD format
time_str	Time string in HHMMSS format

Examples

prep_datetime("221212", "143000")

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Prep lat/lon data

Description

Convert string representation of decimal degrees to numeric.

Usage

prep_lat_lon(x)

Arguments

x	String representing decimal degrees that end in N,S,E,W

Examples

prep_lat_lon(c("121.51W", "121.51E"))
prep_lat_lon(c("38.24N", "38.24S"))

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