aosat: Artic Oscillation data based on SAT data

In UsingR: Data Sets, Etc. for the Text "Using R for Introductory Statistics", Second Edition

Artic Oscillation data based on SAT data

Description

A time series of January, February, and March measurements of the annular modes from January 1851 to March 1997.

Usage

data(aosat)

Format

The format is: first column is date in years with fraction to indicate month. The second column is the measurement.

Details

This site http://jisao.washington.edu/ao/ had more details on the importance of this time series.

Source

This data came from the file AO\_SATindex\_JFM\_Jan1851March1997.ascii at http://www.atmos.colostate.edu/ao/Data/ao\_index.html

Examples

data(aosat)
## Not run: 
library(zoo)
z = zoo(aosat[,2], order.by=aosat[,1])
plot(z)
## yearly
plot(aggregate(z, floor(index(z)), mean))
## decade-long means
plot(aggregate(z, 10*floor(index(z)/10), mean))

## End(Not run)

UsingR documentation built on March 18, 2022, 7:32 p.m.