Old Faithful Geyser Data
Waiting time between eruptions and the duration of the eruption for the Old Faithful geyser in Yellowstone National Park, Wyoming, USA.
Eruption time (mins).
Waiting time to next eruption (mins).
Härdle, W. (1991). Smoothing Techniques with Implementation in S. New York: Springer.
Azzalini, A. and Bowman, A. W. (1990). A look at some data on the Old Faithful geyser. Applied Statistics, 39, 357–365.
t = octave.dataset.faithful; % Munge the data, rounding eruption time to the second e60 = 60 * t.eruptions; ne60 = round (e60); # TODO: Port zapsmall to Octave eruptions = ne60 / 60; # TODO: Display mean relative difference and bins summary % Histogram of rounded eruption times figure hist (ne60, max (ne60)) xlabel ("Eruption time (sec)") ylabel ("n") title ("faithful data: Eruptions of Old Faithful") % Scatter plot of eruption time vs waiting time figure scatter (t.eruptions, t.waiting) xlabel ("Eruption time (min)") ylabel ("Waiting time to next eruption (min)") title ("faithful data: Eruptions of Old Faithful") # TODO: Port Lowess smoothing to Octave