[Matplotlib-users] bug somewhere called by draw_lines

[Andrew S. <str...@as...>]

when running the following simple script:

from matplotlib.matlab import *
from numarray import *

theta = arange(0.0,8*pi,0.1)
a=1
b=.2

dt = 0.0
x = a*cos( theta )*exp(b*theta)
y = a*sin( theta )*exp(b*theta)

plot(x,y)
show()
#savefig('ss')

with the following combination of software:

matplotlib 0.54
numarray 0.9
python 2.2.1
windows XP

if I use WXAgg or Agg, I get this:

Traceback (most recent call last):
  File "simple_spiral.py", line 13, in ?
    show()
  File 
"C:\Python22\Lib\site-packages\matplotlib\backends\backend_wx.py", line 
1124, in show
    figwin.canvas.draw()
  File 
"C:\Python22\Lib\site-packages\matplotlib\backends\backend_wxagg.py", 
line 50, in draw
    agg.draw()
  File 
"C:\Python22\Lib\site-packages\matplotlib\backends\backend_agg.py", line 
299, in draw
    self.figure.draw(self.renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\figure.py", line 128, 
in draw
    for a in self.axes: a.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\axes.py", line 603, in draw
    self.xaxis.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\axis.py", line 463, in draw
    tick.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\axis.py", line 125, in draw
    if midPoint and self.tick1On: self.tick1line.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\lines.py", line 193, in 
draw
    self._lineFunc(renderer, gc, xt, yt)
  File "C:\Python22\Lib\site-packages\matplotlib\lines.py", line 326, in 
_draw_solid
    renderer.draw_lines(gc, xt,yt)
TypeError: can't convert complex to float; use e.g. abs(z)

if I use PS, I get this:

Traceback (most recent call last):
  File "simple_spiral.py", line 14, in ?
    savefig('ss')
  File "C:\Python22\Lib\site-packages\matplotlib\matlab.py", line 1156, 
in savefig
    manager.canvas.print_figure(*args, **kwargs)
  File 
"C:\Python22\Lib\site-packages\matplotlib\backends\backend_ps.py", line 
378, in print_figure
    self.figure.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\figure.py", line 128, 
in draw
    for a in self.axes: a.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\axes.py", line 603, in draw
    self.xaxis.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\axis.py", line 463, in draw
    tick.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\axis.py", line 125, in draw
    if midPoint and self.tick1On: self.tick1line.draw(renderer)
  File "C:\Python22\Lib\site-packages\matplotlib\lines.py", line 193, in 
draw
    self._lineFunc(renderer, gc, xt, yt)
  File "C:\Python22\Lib\site-packages\matplotlib\lines.py", line 326, in 
_draw_solid
    renderer.draw_lines(gc, xt,yt)
  File 
"C:\Python22\Lib\site-packages\matplotlib\backends\backend_ps.py", line 
103, in draw_lines
    ps.append('newpath %s moveto' % _nums_to_str((x[0], y[0])))
  File 
"C:\Python22\Lib\site-packages\matplotlib\backends\backend_ps.py", line 
36, in _nums_to_str
    return ' '.join([_int_or_float(val, fmt) for val in seq])
  File 
"C:\Python22\Lib\site-packages\matplotlib\backends\backend_ps.py", line 
41, in _int_or_float
    ival = int(val)
TypeError: can't convert complex to int; use e.g. int(abs(z))