From: Paul A Bristow (pbristow_at_[hidden])
Date: 2007-05-23 10:03:34
1 It seems nice to be able to create a one-stop visualisation of a
container, for example:
// fill with my data...
my-graph << my_data_structure; //
But should the myriad of graph plotting *options* be set using operator <<
allowing them to be chained together thus
my_graph << line_color(black) << point_color(blue)
<< x_range(-10, 10) << y_range(0, 5)...;
as suggested by John Maddock (who has a most irritating habit of being right ;-)
or more conventional setter member functions
and could getter versions return their current values
if (my_graph.line_color() == black) ....
possibly chained (return this) to reduce typing?
my_graph.line_color(black).point_color(blue).x_range(-10, 10).y_range(0, 5);
2 How can a set of plot settings be 'saved' for repeated use? Once one has chosen a plot style, line_color black, point_color blue
..., one wants to save this for re-use (though things like the range may change).
3 Does anyone have experience with auto-axis scaling algorithms. The best reference I have found is Michael Bramley,
C/C++ Users journal, www.cuj.com July 2000, pp 20 - 26
But this does not always give the nicest scales - it would work nicely using decimal, but the damned binary FP *wrong* bits at the
end screw up the comparisons. (Excel plots show this behaviour).
--- Paul A Bristow Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB +44 1539561830 & SMS, Mobile +44 7714 330204 & SMS pbristow_at_[hidden]
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