speed_to_knots: Convert between standard units of measure for wind speed

In weathermetrics: Functions to Convert Between Weather Metrics

Description

speed_to_knots creates a numeric vector of speed in knots from a numeric vector of speed in the specified unit.

Usage

speed_to_knots(x, unit, round = 1)

Arguments

x	Numeric vector of wind speeds, in units specified by unit
unit	Character specifying the speed unit other than knots. Possible values are: mph: Miles per hour mps: Meters per second ftps: Feet per second kmph: Kilometers per hour
round	An integer indicating the number of decimal places to round the converted value.

Value

A numeric vector of speeds (in knots)

Note

Equations are from the source code for the National Oceanic and and Atmospheric Administration's online wind speed converter

Author(s)

Joshua Ferreri [e-mail], Brooke Anderson [e-mail]

References

http://www.srh.noaa.gov/epz/?n=wxcalc_windconvert

See Also

knots_to_speed

Examples

data(beijing)
beijing$knots <- speed_to_knots(beijing$kmph, unit = "kmph", round = 2)
beijing

weathermetrics documentation built on May 2, 2019, 2:18 a.m.