plot

This is a simple light weight plotting module that can be used with Boa or easily integrated into your own wxPython application. The emphasis is on small size and fast plotting for large data sets. It has a reasonable number of features to do line and scatter graphs easily as well as simple bar graphs. It is not as sophisticated or as powerful as SciPy Plt or Chaco. Both of these are great packages but consume huge amounts of computer resources for simple plots. They can be found at http://scipy.com

This file contains two parts; first the re-usable library stuff, then, after a “if __name__==’__main__’” test, a simple frame and a few default plots for examples and testing.

Based on wxPlotCanvas Written by K.Hinsen, R. Srinivasan; Ported to wxPython Harm van der Heijden, feb 1999

Major Additions Gordon Williams Feb. 2003 (g_will@cyberus.ca)

-More style options -Zooming using mouse “rubber band” -Scroll left, right -Grid(graticule) -Printing, preview, and page set up (margins) -Axis and title labels -Cursor xy axis values -Doc strings and lots of comments -Optimizations for large number of points -Legends

Did a lot of work here to speed markers up. Only a factor of 4 improvement though. Lines are much faster than markers, especially filled markers. Stay away from circles and triangles unless you only have a few thousand points.

Times for 25,000 points Line - 0.078 sec Markers Square - 0.22 sec dot - 0.10 circle - 0.87 cross,plus - 0.28 triangle, triangle_down - 0.90

Thanks to Chris Barker for getting this version working on Linux.

Zooming controls with mouse (when enabled):

Left mouse drag - Zoom box. Left mouse double click - reset zoom. Right mouse click - zoom out centred on click location.

Inheritance Diagram

Inheritance diagram for module plot

Classes Summary

PlotCanvas	Subclass of a wx.Panel which holds two scrollbars and the actual
PlotGraphics	Container to hold PolyXXX objects and graph labels
PlotPrintout	Controls how the plot is made in printing and previewing
PolyLine	Class to define line type and style
PolyMarker	Class to define marker type and style
PolyPoints	Base Class for lines and markers
PolySpline	Class to define line type and style
TestFrame