knots_to_speed: Convert from knots to standard units of wind speed

Description Usage Arguments Details Value Note Author(s) References See Also Examples

Description

knots_to_speed creates a numeric vector of speed, in units specified by unit, from a numeric vector of speed in knots.

Usage

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Arguments

knots

Numeric vector of speeds in knots

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.

Details

Output will be in the speed units specified by unit.

Value

A numeric vector of speeds (in the specified unit)

Note

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

Author(s)

Joshua Ferreri joshua.m.ferreri@gmail.com, Brooke Anderson brooke.anderson@colostate.edu

References

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

See Also

speed_to_knots

Examples

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data(foco)
foco$mph <- knots_to_speed(foco$knots, unit = "mph", round = 0)
foco$mps <- knots_to_speed(foco$knots, unit = "mps", round = NULL)
foco$ftps <- knots_to_speed(foco$knots, unit = "ftps")
foco$kmph <- knots_to_speed(foco$knots, unit = "kmph")
foco

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