doy_noy: Look up day of year (doy) or night of year (noy)

In bioRad: Biological Analysis and Visualization of Weather Radar Data

Look up day of year (doy) or night of year (noy)

Description

Returns the day of year (doy) or night of year (noy) number for datetimes and various bioRad objects. The first night of the year is the night with datetime Jan 01 00:00:00 in the local time zone, so sunset on Jan 1 occurs on the second night of the year and New Years Eve on Dec 31 occurs on the first night of the new year.

Usage

doy(x, ..., method = "fast")

noy(x, ..., method = "fast")

## Default S3 method:
doy(x, lon, lat, ..., method = "fast")

## Default S3 method:
noy(x, lon, lat, ..., method = "fast")

## S3 method for class 'vp'
doy(x, ..., method = "fast")

## S3 method for class 'vp'
noy(x, ..., method = "fast")

## S3 method for class 'vpts'
doy(x, ..., method = "fast")

## S3 method for class 'vpts'
noy(x, ..., method = "fast")

## S3 method for class 'vpi'
doy(x, ..., method = "fast")

## S3 method for class 'vpi'
noy(x, ..., method = "fast")

## S3 method for class 'pvol'
doy(x, ..., method = "fast")

## S3 method for class 'pvol'
noy(x, ..., method = "fast")

Arguments

x	A pvol, vp, vpts, or vpi object, or a base::as.POSIXct datetime.
...	Optional lat, lon arguments.
method	Method by which to do the time zone lookup. Either fast (default) or accurate. See lutz::tz_lookup_coords].
lon	Numeric. Longitude in decimal degrees.
lat	Numeric. Latitude in decimal degrees.

Value

integer representing the ordinal day of year or night of year.

Examples

# Get day of year of a vp object
noy(example_vp)

# Get night of year of a vp object
noy(example_vp)

# Get night of year of a vpts object
noy(example_vpts)

bioRad documentation built on Aug. 29, 2025, 5:14 p.m.