# seas2ann: Annual maxima from seasonal maxima In flood: Statistical Methods for the (Regional) Analysis of Flood Frequency

## Description

Calculates annual maxima from seasonal maxima of two seasons.

## Usage

 `1` ```seas2ann(x1, x2, na.rm = TRUE) ```

## Arguments

 `x1` vector or matrix of observations from season 1 (rows: observations, columns: stations). `x2` vector or matrix of observations from season 2 (rows: observations, columns: stations). `na.rm` logical. `TRUE`: the annual maximum will be calculated even if one observation of the two seasons is a missing value, e.g. winter maximum is 58 and summer maximum is `NA` the annual maximum is 58. If both observations are NA, the annual maximum is set to `NA`, too. `FALSE`: the annual maximum will be set to `NA` if one observation of the two seasons is a missing value, e.g. winter maximum is 58 and summer maximum is `NA` the annual maximum is `NA`.

## Value

Matrix of annual observations (rows: observations, columns: stations).

## Examples

 ```1 2 3 4 5 6 7 8 9``` ```set.seed(28379) x1 <- matrix(round(rnorm(8, 20, 25)), ncol=2) x1[2] <- NA x2 <- matrix(round(rnorm(8, 20, 25)), ncol=2) x2[c(2,5,6)] <- NA x1 x2 seas2ann(x1,x2,TRUE) seas2ann(x1,x2,FALSE) ```

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