| qrPwlm {cdfquantreg} | R Documentation |
Probability Weighted L-moment Skewness and Kurtosis
Description
Calculate the skew and kurtosis statistics based on probability weighted moments, via simulation method.
Usage
qrPwlm(x, n = NULL, mu = NULL, sigma = NULL, fd = NULL, sd = NULL)
Arguments
x |
The vector of values for the calculation of Skewness and Kurtosis. |
n |
The number of samples drawn in the simulation. The higher this value, the greater accuracy. |
mu |
vector of means. |
sigma |
vector of standard deviations. |
fd |
A string that specifies the parent distribution. |
sd |
A string that specifies the sub-family distribution. |
Details
This function computes the L-moment measures of skew and kurtosis, which may be computed via linear combinations of probability-weighted moments (Greenwood, Landwehr, Matalas and Wallis, 1979).
Value
The tau3(skew) and tau4(kurtosis) values of the L-moment.
References
Greenwood, J. A., Landwehr, J. M., Matalas, N. C., & Wallis, J. R. (1979). Probability weighted moments: definition and relation to parameters of several distributions expressable in inverse form. Water Resources Research, 15(5), 1049-1054.
Examples
qrPwlm(n = 1000, mu = 0.5, sigma = 1, fd = 't2', sd = 't2')