aosat {UsingR} | R Documentation

## 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

See http://jisao.washington.edu/ao/ for 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)

[Package UsingR version 0.1-4 Index]