To run CO2 data in matlab: type "co2dat" then "co2FFT"
To run sunspot data in matlab: playshow sunspot

Note: go to http://www.glue.umd.edu/~nsw/matlab.doc/techdoc/using_ml/ch_6_d18.html
for another way to do this!

Other examples:
See Matthews and Fink
page 308-308 for data
to transform with fft.