eva3dm (version 0.99.1)

q2rh: Convert absolute humidity to relative humidity

Description

function to convert absolute humidity to relative humidity.

Usage

q2rh(q, t = 15, p = 101325)

Value

vector or data.frame with time and the relative humidity, units are

Arguments

q

vector (or data.frame) of absolute humidity (in g/Kg)

t

vector (or data.frame) of temperature (in Celcius)

p

vector (or data.frame) of pressure (in Pa)

Examples

# for a single value (or same length vectors)
q2rh(q = 0.0002038, t = 29.3, p = 100800)

# using all data.frames
times <- seq(as.POSIXct('2024-01-01',tz = 'UTC'),
             as.POSIXct('2024-01-02',tz = 'UTC'),
             by = 'hour')[1:5]
q2   <- data.frame(time = times, a = rep(0.0002038,5))
temp <- data.frame(time = times, a = rep(     29.3,5))
pres <- data.frame(time = times, a = rep(   100800,5))
q2rh(q = q2, t = temp, p = pres)

# using data.frame for q and t (p is cte.)
q2rh(q = q2, t = temp, p = 100000)

# using data.frame for q and p (t is cte.)
q2rh(q = q2, t = 26, p = pres)

# using data.frame only for q (p and t are cte.)
q2rh(q = q2, t = 26, p = 100000)