Some older members of this list will remember the strange pleasure of
seeing a pattern slowly emerge as points were laboriously added to a
scatterplot on graph paper.
A colleague (Harold Henderson, in fact) recently pointed out to me that
there is some quite interesting structure in the abrasion loss data set of
O. L. Davies (reprinted in the book by Hand et al) if you consider the
order of the data. One way to see this is by adding a column of row numbers
to the data and forming a scatterplot matrix and doing a bit of brushing.
Harold commented that someone plotting any two of the variables manually
would have seen this as the plots would form in a series of roughly
parallel curves.
It occured to me that we could simulate manual plotting by allowing points
to form progressively row by row; or more generally at times proportional
to a 'time' variable which, of course, need not really be time.
I just thought that I'd toss this idea out in case it appeals to any of the
gun programmers on this list! If it doesn't I may have a bash at it some
day.
Murray
Murray Jorgensen, Department of Statistics, U of Waikato, Hamilton, NZ
-----[+64-7-838-4773]---------------------------[maj at waikato.ac.nz]-----
"Doubt everything or believe everything:these are two equally convenient
strategies. With either we dispense with the need to think."
http://www.cs.waikato.ac.nz/stats/Staff/maj.html - Henri Poincare'
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