I just wrote up an extensive example using PL/R to build a logistic map for a range of values of r. The end result is a pretty picture generated within the database and handed back to the webserver. Very cool.
For complete details, see http://www.joeconway.com/web/guest/pl/r/-/wiki/Main/Bytea+Graphing+Example
Running aggregate on wide matrices takes loooong; use nested apply or data
tables instead !
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The aggregate function can be very useful in R, allowing one to run a
function (e.g. mean) within groups of rows, in each column in a
matrix/data-frame an...
1 day ago
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