Re: [Matplotlib-users] Axes.stem() doesn't draw stemlines if yscale is logarithmic
This is a tricky one. It appears this bug also exists in 0.91.x,
perhaps earlier as well, so it isn't a regression.
I don't like the idea of setting the minimum to 1, especially for when
the scale isn't log. Setting it to a really small positive value (like
1e-9) is better, but the autoscaling of the log plot then goes down to
1e-9 as well.
Do any other developers have better suggestions? We may have to do some
magic in at drawing time (or convince the autoscaler to ignore the stem
lines) -- but I'd like to find a way that minimizes additional complexity.
Cheers,
Mike
[EMAIL PROTECTED] wrote:
Hello,
I tried to do a stem plot on an Axes with logarithmic scale, experiencing
that the stemlines were not drawn...
axes.py (svn trunk, 2008-07-08):
def stem(self, x, y, linefmt='b-', markerfmt='bo', basefmt='r-'):
[...]
stemlines = []
for thisx, thisy in zip(x, y):
l, = self.plot([thisx,thisx], [0, thisy], linefmt)
stemlines.append(l)
After Axes.set_yscale('log'), Axes.stem() no longer draws the stemlines
because it tries to draw from y=0, thereby apparently triggering some guard
which prevents plotting log(0), hence suppressing the complete stemline.
Dirty hacking, I replace [0, thisy] with [1, thisy] in case yscale=='log' and
it works for my plots, but for sure there is more to do to make it robust...
Please give me a heads-up if I just oversaw the Right Way to do a stem plot
with logarithmic yscale.
Cheers,
Dirk
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--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA
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Re: [Matplotlib-users] Axes.stem() doesn't draw stemlines if yscale is logarithmic
Le lundi 14 juillet 2008 à 09:08 -0400, Michael Droettboom a écrit : Do any other developers have better suggestions? We may have to do some magic in at drawing time (or convince the autoscaler to ignore the stem lines) -- but I'd like to find a way that minimizes additional complexity. Is it possible do proceed as using axvline, i.e. specifying the axes coordinates? In this case, it would require a mix of data coordinate (the value to display) and of axes coordinate (the bottom of the curve). When would values to render be converted ? -- Fabrice Silva [EMAIL PROTECTED] LMA UPR CNRS 7051 - équipe S2M - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Axes.stem() doesn't draw stemlines if yscale is logarithmic
Hello,
I tried to do a stem plot on an Axes with logarithmic scale, experiencing that
the stemlines were not drawn...
axes.py (svn trunk, 2008-07-08):
def stem(self, x, y, linefmt='b-', markerfmt='bo', basefmt='r-'):
[...]
stemlines = []
for thisx, thisy in zip(x, y):
l, = self.plot([thisx,thisx], [0, thisy], linefmt)
stemlines.append(l)
After Axes.set_yscale('log'), Axes.stem() no longer draws the stemlines because
it tries to draw from y=0, thereby apparently triggering some guard which
prevents plotting log(0), hence suppressing the complete stemline.
Dirty hacking, I replace [0, thisy] with [1, thisy] in case yscale=='log' and
it works for my plots, but for sure there is more to do to make it robust...
Please give me a heads-up if I just oversaw the Right Way to do a stem plot
with logarithmic yscale.
Cheers,
Dirk
-
Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
Studies have shown that voting for your favorite open source project,
along with a healthy diet, reduces your potential for chronic lameness
and boredom. Vote Now at http://www.sourceforge.net/community/cca08
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