oce (version 0.9-14)

soi: Southern Oscillation Index

Description

This is the Southern Oscillation Index, downloaded in May 2014 and processed as follows. d <- scan("http://www.cgd.ucar.edu/cas/catalog/climind/SOI.signal.annstd.ascii") isYear <- d > 1800 index <- d[!isYear] year <- 1/24 + seq(d[isYear][1], by=1/12, length.out=length(index)) ## Trim -99.99 values missing <- index < -90 year <- year[!missing] index <- index[!missing] soi <- data.frame(year=year, index=index)

Usage

data(soi)

source

http://www.cgd.ucar.edu/cas/catalog/climind/SOI.signal.annstd.ascii

Examples

library(oce)
data(soi)
plot(soi$year, soi$index, type='l')