humidity.to.dewpoint: Calculate dew point temperature.

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

View source: R/moisture_conversions.R

Description

humidity.to.dewpoint creates a numeric vector of dew point temperature from numeric vectors of air temperature and relative humidity.

Usage

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humidity.to.dewpoint(rh = NA, t = NA, temperature.metric = "fahrenheit")

Arguments

rh

Numeric vector of relative humidity (in %).

t

Numeric vector of air temperatures.

temperature.metric

Character string indicating the temperature metric of air temperature. Possible values are fahrenheit or celsius.

Details

Dew point temperature will be calculated in the same metric as the temperature vector (as specified by the temperature.metric option). If you'd like dew point temperature in a different metric, use the function celsius.to.fahrenheit or fahrenheit.to.celsius on the output from this function.

Value

A numeric vector of dew point temperature, in the same metric as the temperature vector (as specified by the temperature.metric option).

Note

Equations are from the source code for the US National Weather Service's online heat index calculator.

Author(s)

Brooke Anderson [email protected], Roger Peng [email protected]

References

National Weather Service Hydrometeorological Prediction Center Web Team. Heat Index Calculator. 30 Jan 2015. http://www.wpc.ncep.noaa.gov/html/heatindex.shtml. Accessed 18 Dec 2015.

See Also

dewpoint.to.humidity, fahrenheit.to.celsius, celsius.to.fahrenheit

Examples

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# Calculate dew point temperature from relative humidity and
# air temperature.

data(newhaven)
newhaven$DP <- humidity.to.dewpoint(t = newhaven$TemperatureF,
                                    rh = newhaven$Relative.Humidity,
                                    temperature.metric = 'fahrenheit')
newhaven

weathermetrics documentation built on May 29, 2017, 3:39 p.m.