PlotPos {FloodFreqPlot}

Plotting Position Probability

Description

PlotPos returns the empirical probability values corresponding to the observed data of hydrological extreme events as a vector of numerics.

Usage

PlotPos(data_obs, PP)

Arguments

data_obs

A vector, data frame or matrix containing observed data or flood quantiles.

PP

A character string that determines the empirical formula used to calculate the probability. The formula can be chosen from the list: "Blom", "Chegodayev", "California" "Gringorten", "Hazen", "Tukey", and "Weibull".

Details

This is a function to calculate the emprical probability values assigned to the observed data of hydrological extreme events to be plotted.

Value

The function returns the probabilities assigned to the observed data as a vector of numerics.

Reference

Chow, V. T., Maidment, D. R., & Mays, L. W. (1988). Applied Hydrology. McGraw-Hill, New York, U.S.

See Also

ProbPlot for graphical frequency analysis.

Examples

# First Example
data('Harricana')
PlotPos(data_obs = Harricana, PP = 'Weibull')

# Second Example
data('B17C_Tab8_1')
PlotPos(data_obs = B17C_Tab8_1, PP = 'Cunnane')