lfstat (version 0.9.12)

Qxx: Qxx, Q95, Q90, Q70

Description

Calculates the quantiles of an object of class 'lfobj'.

Usage

Qxx(lfobj, Qxx, year = "any", monthly = FALSE, yearly = FALSE,
breakdays = NULL, na.rm = TRUE)
Q95(lfobj, year = "any", monthly = FALSE, yearly = FALSE,
breakdays = NULL, na.rm = TRUE)
Q90(lfobj, year = "any", monthly = FALSE, yearly = FALSE,
breakdays = NULL, na.rm = TRUE)
Q70(lfobj, year = "any", monthly = FALSE, yearly = FALSE,
breakdays = NULL, na.rm = TRUE)

Value

A length one vector giving the Q95 for the whole series or the specified year. If yearly is true, a vector of the annual Q95s is returned. If break days are specified, the values are separated per season.

Arguments

lfobj

An object of class 'lfobj'

Qxx

The quantile to calculate, e.g. 70 would refer to Q70

year

The year for which the Q95 should be computed. If hyearstart != 1 the Q95 is calculated for the hydrological year, year = "any" means the whole series should be taken.

monthly

logical - Should the Q95 be calculated separately for every month?.

yearly

logical - If TRUE, the Q95 is calculated for each hydrological year separately.

breakdays

A vector of break days if the Q95 should be calculated for different seasons.

na.rm

Should NAs be ignored?

Author

Daniel Koffler and Gregor Laaha

Details

If breakdays is a single day, e.g. "01/06", the start of the hydrological year is taken as the second break day. If more than two seasons are to be specified, a vector of all break days is needed.

References

Gustard, A. & Demuth, S. (2009) (Eds) Manual on Low-flow Estimation and Prediction. Operational Hydrology Report No. 50, WNO-No. 1029, 136p.

See Also

MAM

Examples

data(ngaruroro)
Q95(ngaruroro)
Q95(ngaruroro, breakdays = c("01/11","01/05"))
Q95(ngaruroro, year = 1991)
# Calculate Q99
Qxx(ngaruroro, Qxx = 99)