R: Phosphorous Concentrations in Speed River, Monthly

GuelphP {Kendall} | R Documentation

## Phosphorous Concentrations in Speed River, Monthly

### Description

Monthly time series of phosphorous (P) concentrations in mg/l, Speed River, Guelph, Ontario, 1972.1-1977.1."

### Usage

    data(GuelphP)

### Format

The format is: Time-Series [1:72] from 1972 to 1978: 0.47 0.51 0.35 0.19 0.33 NA 0.365 0.65 0.825 1 ... - attr(*, "title")= chr "Phosphorous Data,Speed River,Guelph,1972.1-1977.1"

### Details

See Hipel and McLeod (2005, pp.707-709 and p.986). Hipel and McLeod used intervention analysis to estimate the effect of a phosphorous removal scheme. Intervention analysis was also used to estimate the missing values.

### Source

Hipel, K.W. and McLeod, A.I., (2005). Time Series Modelling of Water Resources and Environmental Systems. Electronic reprint of our book orginally published in 1994. http://www.stats.uwo.ca/faculty/aim/1994Book/.

### Examples

    data(GuelphP)
    plot(GuelphP)
    #replace missing values in the series with estimates obtained from Hipel and McLeod
    # (2005, p. 986)
    missingEst<-c(0.1524, 0.2144, 0.3064, 0.1342)
    GuelphP2<-GuelphP
    GuelphP2[is.na(GuelphP)]<-missingEst

[Package Kendall version 2.2 Index]