banking to 45 degrees

===== Original message from Alan G. Isaac | Fri, 1 Jul 2005:

This seems possibly related to sparkplots:

not really, but sparklines should probably also be scaled so
that the steepest slope is 45 degrees for accurate visual
decoding of the graph. [Edward Tufte has also written about
banking to 45 degrees in his excellent books.}

there is also another interesting sparkline implementation
in Python, using PIL:

thanks for the input.