Gurevitch et al. (1986) demonstrated time series analysis with data describing change in CO\(_2\) concentration of airstreams passing over a Sedum wrightii test plant.
data(sedum.ts)
A data frame with 24 observations on the following 3 variables.
exchange
CO\(_2\) exchange, measured as: [change in CO\(_2\) concentration (g/mg)]/ plant fresh mass (g). Thus units are 1/mg. Positive values indicate net CO\(_2\) uptake while negative values indicate net CO2 output.
time
A numeric vector indicating two hour intervals
treatment
Dry
= water withheld for several week, Wet
= plant well watered.