# confInt_TL: Estimated confidence intervals using TL In flood: Statistical Methods for the (Regional) Analysis of Flood Frequency

## Description

Estimated regional (or local) (1-alpha)-confidence intervals for an estimated quantile by using annual TL(0,1)-moments (TL).

## Usage

 `1` ```confInt_TL(x, p, j = 1, alpha = 0.05) ```

## Arguments

 `x` vector or matrix of annual observations. `p` a probability. `j` quantile and parameter estimation for the jth station (jth column of `x`). Irrelevant if is `x` is a vector. `alpha` confidence level for confidence interval.

## Value

List of

• `ci` confidence interval.

• `quant` estimated quantile from a GEV using trimmed L-moments (leftrim=0, rightrim=1).

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12``` ```library("evd") # Seasonal observations of 80 years at one station: x1 <- rgev(80, 2, 1, 0.2) # observations from season 1 x2 <- rgev(80, 3, 1, 0.3) # observations from season 2 x <- seas2ann(x1, x2) # calculaes annual maxima of the two seasons confInt_TL(x=x, p=0.95, alpha=0.05) # Seasonal observations of 100 years at 4 stations: x1 <- matrix(rgev(400, 2, 1, 0.3), ncol=4) # observations from season 1 x2 <- matrix(rgev(400, 2, 1, 0.2), ncol=4) # observations from season 2 x <- seas2ann(x1, x2) # calculaes annual maxima of the two seasons confInt_TL(x=x, j=2, p=0.95, alpha=0.05) ```

flood documentation built on May 30, 2017, 8:25 a.m.