On Mar 15, 2010, at 3:03 PM, Dan McMahill wrote:
Geoff Swan wrote:
I've seen commercial tools that have some predefined grids like
rectangular,
polar, smith but so far none have taken it to the next level of
letting you
add custom ones or the custom readout.
Just in case you missed it - qucs has a number of plotting outputs
including a Smith chart. I don't recall how good it is in terms of
the
interactivity with datapoints on the various graphs.
Having a built in smith chart is better than nothing but having a
way for the user to define his/her own types of gridlines and cursor
readouts is much better. Smith charts aren't the only ones you
might want.
matplotlib allows you to apply generic coordinate transformations to
the axis. The readout cursor then applies that same transformation.
On a side note.
It is a very robust plotting package and I believe it hold it own very
easily with gnuplot.
When I dive down into plotting with it I can get even better results
with matplotlib than with gnuplot, because I can run python code
against the graphics that the plots generate.
Steve
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