linestyles in LineCollection

Community matplotlib-users
1

I've been trying to change the linestyles in a LineCollection, but
without any success...

If I'm using:
col = collections.LineCollection(listXY, linewidths=circwdt,
colors=circcol, linestyle='solid', label=plabel)

it works fine, but anything other than 'solid' gives me an error when
the code calls FigureCanvasAgg.draw(self) (it is a wxpython app):

Traceback (most recent call last):
  File "/home/guano/Arbeit/Stout/StereoPanel.py", line 552, in PlotChecked
    self.stereoCanvas.draw()
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_wxagg.py",
line 59, in draw
    FigureCanvasAgg.draw(self)
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 314, in draw
    self.figure.draw(self.renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 774, in draw
    for a in self.axes: a.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 1721, in draw
    a.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/lib/pymodules/python2.6/matplotlib/legend.py", line 386, in draw
    self._legend_box.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 488, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 535, in draw
    drawFunc(renderer, gc, tpath, affine.frozen())
  File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 874,
in _draw_lines
    self._lineFunc(renderer, gc, path, trans)
  File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 925,
in _draw_dashed
    renderer.draw_path(gc, path, trans)
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 98, in draw
_path
    self._renderer.draw_path(gc, path, transform, rgbFace)
TypeError: float() argument must be a string or a number

From the MPL docs, I see that i should be able to use other linestyles:

http://matplotlib.sourceforge.net/api/collections_api.html#matplotlib.collections.LineCollection

linestyles [ ‘solid’ | ‘dashed’ | ‘dashdot’ | ‘dotted’ ]
a string or dash tuple. The dash tuple is:

I'm using MPL 0.99.0 in Ubuntu Karmic (9.10)

tks

···

--
Prof. Carlos Henrique Grohmann - Geologist D.Sc.
Institute of Geosciences - Univ. of São Paulo, Brazil
http://www.igc.usp.br/pessoais/guano
Linux User #89721
________________
Can’t stop the signal.

2

I can't reproduce the error on 0.99. Can you provide a complete script that reproduces the error?

Mike

Carlos Grohmann wrote:

···

I've been trying to change the linestyles in a LineCollection, but
without any success...

If I'm using:
col = collections.LineCollection(listXY, linewidths=circwdt,
colors=circcol, linestyle='solid', label=plabel)

it works fine, but anything other than 'solid' gives me an error when
the code calls FigureCanvasAgg.draw(self) (it is a wxpython app):

Traceback (most recent call last):
  File "/home/guano/Arbeit/Stout/StereoPanel.py", line 552, in PlotChecked
    self.stereoCanvas.draw()
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_wxagg.py",
line 59, in draw
    FigureCanvasAgg.draw(self)
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 314, in draw
    self.figure.draw(self.renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 774, in draw
    for a in self.axes: a.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 1721, in draw
    a.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/lib/pymodules/python2.6/matplotlib/legend.py", line 386, in draw
    self._legend_box.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 488, in draw
    c.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 535, in draw
    drawFunc(renderer, gc, tpath, affine.frozen())
  File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 874,
in _draw_lines
    self._lineFunc(renderer, gc, path, trans)
  File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 925,
in _draw_dashed
    renderer.draw_path(gc, path, trans)
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 98, in draw
_path
    self._renderer.draw_path(gc, path, transform, rgbFace)
TypeError: float() argument must be a string or a number

>From the MPL docs, I see that i should be able to use other linestyles:

http://matplotlib.sourceforge.net/api/collections_api.html#matplotlib.collections.LineCollection

linestyles [ �solid� | �dashed� | �dashdot� | �dotted� ]
a string or dash tuple. The dash tuple is:

I'm using MPL 0.99.0 in Ubuntu Karmic (9.10)

tks

--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

3

Here.

I found out that if I use

from pylab import *

as in the example, it works. But in my app, I'm using

import wx
import matplotlib
from matplotlib.figure import Figure
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.backends.backend_wxagg import NavigationToolbar2WxAgg
from matplotlib.font_manager import fontManager, FontProperties
from matplotlib.collections import LineCollection

could that be the culprit?

Carlos

script:

from pylab import *
import numpy as np

from matplotlib.collections import LineCollection

# We need to set the plot limits, the will not autoscale
ax = axes()
ax.set_xlim((-1,1))
ax.set_ylim((-1,1))

strike = [0,45,90,135]
dip = [10,20,30,40]

listXY =
for i in range(len(strike)):
    beta = np.radians(strike[i])
    phi = np.radians(np.arange(-90,92,2))
    lamb = np.radians((90 - dip[i]))
    alpha = np.arccos(np.cos(phi) * np.cos(lamb))
    tq = np.sqrt(2) * np.sin(alpha/2)
    sint = np.sin(phi) / np.sin(alpha)
    temps = 1 - (sint * sint)
    x = tq * np.sqrt(temps)
    y = tq * sint
    x1 = np.cos(beta) * x + np.sin(beta) * y
    y1 = -np.sin(beta) * x + np.cos(beta) * y
    listXY.append(zip(x1,y1))

col = LineCollection(listXY, linewidths=1, colors='red', linestyles = 'dotted')
ax.add_collection(col, autolim=True)

show()

···

On Wed, Apr 28, 2010 at 09:46, Michael Droettboom <mdroe@...86...> wrote:

I can't reproduce the error on 0.99. Can you provide a complete script that
reproduces the error?

Mike

Carlos Grohmann wrote:

I've been trying to change the linestyles in a LineCollection, but
without any success...

If I'm using:
col = collections.LineCollection(listXY, linewidths=circwdt,
colors=circcol, linestyle='solid', label=plabel)

it works fine, but anything other than 'solid' gives me an error when
the code calls FigureCanvasAgg.draw(self) (it is a wxpython app):

Traceback (most recent call last):
File "/home/guano/Arbeit/Stout/StereoPanel.py", line 552, in PlotChecked
self.stereoCanvas.draw()
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_wxagg.py",
line 59, in draw
FigureCanvasAgg.draw(self)
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 314, in draw
self.figure.draw(self.renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
draw(artist, renderer, *kl)
File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 774, in
draw
for a in self.axes: a.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
draw(artist, renderer, *kl)
File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 1721, in
draw
a.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
draw(artist, renderer, *kl)
File "/usr/lib/pymodules/python2.6/matplotlib/legend.py", line 386, in
draw
self._legend_box.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 488, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
draw(artist, renderer, *kl)
File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 535, in
draw
drawFunc(renderer, gc, tpath, affine.frozen())
File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 874,
in _draw_lines
self._lineFunc(renderer, gc, path, trans)
File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 925,
in _draw_dashed
renderer.draw_path(gc, path, trans)
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 98, in draw
_path
self._renderer.draw_path(gc, path, transform, rgbFace)
TypeError: float() argument must be a string or a number

>From the MPL docs, I see that i should be able to use other linestyles:

http://matplotlib.sourceforge.net/api/collections_api.html#matplotlib.collections.LineCollection

linestyles [ ‘solid’ | ‘dashed’ | ‘dashdot’ | ‘dotted’ ]
a string or dash tuple. The dash tuple is:

I'm using MPL 0.99.0 in Ubuntu Karmic (9.10)

tks

--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

--
Prof. Carlos Henrique Grohmann - Geologist D.Sc.
Institute of Geosciences - Univ. of São Paulo, Brazil
http://www.igc.usp.br/pessoais/guano
Linux User #89721
________________
Can’t stop the signal.

4

Hi there

I found that the error is related to legend! If I disable

self.plotaxes.legend(bbox_to_anchor=(0.95, 0.95), loc=2,
prop=FontProperties(size='small'),numpoints=1)

I can change the linestyles and it works like a charm, but if I turn
on that line again... just errors.

can anyone think of something?

best

Carlos

···

On Wed, Apr 28, 2010 at 09:46, Michael Droettboom <mdroe@...86...> wrote:

I can't reproduce the error on 0.99. Can you provide a complete script that
reproduces the error?

Mike

Carlos Grohmann wrote:

I've been trying to change the linestyles in a LineCollection, but
without any success...

If I'm using:
col = collections.LineCollection(listXY, linewidths=circwdt,
colors=circcol, linestyle='solid', label=plabel)

it works fine, but anything other than 'solid' gives me an error when
the code calls FigureCanvasAgg.draw(self) (it is a wxpython app):

Traceback (most recent call last):
File "/home/guano/Arbeit/Stout/StereoPanel.py", line 552, in PlotChecked
self.stereoCanvas.draw()
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_wxagg.py",
line 59, in draw
FigureCanvasAgg.draw(self)
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 314, in draw
self.figure.draw(self.renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
draw(artist, renderer, *kl)
File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 774, in
draw
for a in self.axes: a.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
draw(artist, renderer, *kl)
File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 1721, in
draw
a.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
draw(artist, renderer, *kl)
File "/usr/lib/pymodules/python2.6/matplotlib/legend.py", line 386, in
draw
self._legend_box.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 224, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/offsetbox.py", line 488, in
draw
c.draw(renderer)
File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46,
in draw_wrapper
draw(artist, renderer, *kl)
File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 535, in
draw
drawFunc(renderer, gc, tpath, affine.frozen())
File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 874,
in _draw_lines
self._lineFunc(renderer, gc, path, trans)
File "/usr/lib/pymodules/python2.6/matplotlib/lines.py", line 925,
in _draw_dashed
renderer.draw_path(gc, path, trans)
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py",
line 98, in draw
_path
self._renderer.draw_path(gc, path, transform, rgbFace)
TypeError: float() argument must be a string or a number

>From the MPL docs, I see that i should be able to use other linestyles:

http://matplotlib.sourceforge.net/api/collections_api.html#matplotlib.collections.LineCollection

linestyles [ ‘solid’ | ‘dashed’ | ‘dashdot’ | ‘dotted’ ]
a string or dash tuple. The dash tuple is:

I'm using MPL 0.99.0 in Ubuntu Karmic (9.10)

tks

--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

--
Prof. Carlos Henrique Grohmann - Geologist D.Sc.
Institute of Geosciences - Univ. of São Paulo, Brazil
http://www.igc.usp.br/pessoais/guano
Linux User #89721
________________
Can’t stop the signal.