[英]python error running matplotlib pyplot
I'm trying to run python code but it has trouble rendering a figure (it manages to plot the curve but fails to add axis and labels etc) and starts to produce a stream of errors. 我正在尝试运行python代码,但是在绘制图形时遇到了麻烦(它可以绘制曲线,但无法添加轴和标签等),并开始产生错误流。 I'm using a windows 7 64bit machine with Python(x,y) and the error stream looks like this: 我正在使用Windows 7 64位计算机和Python(x,y),错误流如下所示:
Also, the error stream below is produced with IDLE
另外,下面的错误流是由IDLE
产生的
but 但
if I run it through Spyder
, the terminal spits out a different error: WindowsError: [Error 2] The system cannot find the file specified
. 如果我通过Spyder
运行它,则终端将显示另一个错误: WindowsError: [Error 2] The system cannot find the file specified
。
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_qt4.py", line 299, in resizeEvent
self.draw()
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_qt4agg.py", line 154, in draw
FigureCanvasAgg.draw(self)
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py", line 451, in draw
self.figure.draw(self.renderer)
File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Python27\lib\site-packages\matplotlib\figure.py", line 1034, in draw
func(*args)
File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Python27\lib\site-packages\matplotlib\axes.py", line 2086, in draw
a.draw(renderer)
File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 1093, in draw
renderer)
File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 1042, in _get_tick_bboxes
extent = tick.label1.get_window_extent(renderer)
File "C:\Python27\lib\site-packages\matplotlib\text.py", line 754, in get_window_extent
bbox, info, descent = self._get_layout(self._renderer)
File "C:\Python27\lib\site-packages\matplotlib\text.py", line 320, in _get_layout
ismath=False)
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py", line 205, in get_text_width_height_descent
renderer=self)
File "C:\Python27\lib\site-packages\matplotlib\texmanager.py", line 669, in get_text_width_height_descent
page = next(iter(dvi))
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 85, in __iter__
have_page = self._read()
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 146, in _read
self._dispatch(byte)
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 234, in _dispatch
self._fnt_def(k, c, s, d, a, l, n)
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 394, in _fnt_def
tfm = _tfmfile(n[-l:].decode('ascii'))
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 901, in _tfmfile
return _fontfile(texname, Tfm, '.tfm', _tfmcache)
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 891, in _fontfile
filename = find_tex_file(texname + suffix)
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 872, in find_tex_file
stderr=subprocess.PIPE)
File "C:\Python27\lib\subprocess.py", line 701, in __init__
errread, errwrite), to_close = self._get_handles(stdin, stdout, stderr)
File "C:\Python27\lib\subprocess.py", line 832, in _get_handles
p2cread = self._make_inheritable(p2cread)
File "C:\Python27\lib\subprocess.py", line 883, in _make_inheritable
_subprocess.DUPLICATE_SAME_ACCESS)
WindowsError: [Error 6] The handle is invalid
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_qt4.py", line 299, in resizeEvent
self.draw()
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_qt4agg.py", line 154, in draw
FigureCanvasAgg.draw(self)
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py", line 451, in draw
self.figure.draw(self.renderer)
File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Python27\lib\site-packages\matplotlib\figure.py", line 1034, in draw
func(*args)
File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Python27\lib\site-packages\matplotlib\axes.py", line 2086, in draw
a.draw(renderer)
File "C:\Python27\lib\site-packages\matplotlib\artist.py", line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 1093, in draw
renderer)
File "C:\Python27\lib\site-packages\matplotlib\axis.py", line 1042, in _get_tick_bboxes
extent = tick.label1.get_window_extent(renderer)
File "C:\Python27\lib\site-packages\matplotlib\text.py", line 754, in get_window_extent
bbox, info, descent = self._get_layout(self._renderer)
File "C:\Python27\lib\site-packages\matplotlib\text.py", line 320, in _get_layout
ismath=False)
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py", line 205, in get_text_width_height_descent
renderer=self)
File "C:\Python27\lib\site-packages\matplotlib\texmanager.py", line 669, in get_text_width_height_descent
page = next(iter(dvi))
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 85, in __iter__
have_page = self._read()
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 146, in _read
self._dispatch(byte)
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 234, in _dispatch
self._fnt_def(k, c, s, d, a, l, n)
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 394, in _fnt_def
tfm = _tfmfile(n[-l:].decode('ascii'))
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 901, in _tfmfile
return _fontfile(texname, Tfm, '.tfm', _tfmcache)
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 891, in _fontfile
filename = find_tex_file(texname + suffix)
File "C:\Python27\lib\site-packages\matplotlib\dviread.py", line 872, in find_tex_file
stderr=subprocess.PIPE)
File "C:\Python27\lib\subprocess.py", line 701, in __init__
errread, errwrite), to_close = self._get_handles(stdin, stdout, stderr)
File "C:\Python27\lib\subprocess.py", line 832, in _get_handles
p2cread = self._make_inheritable(p2cread)
File "C:\Python27\lib\subprocess.py", line 883, in _make_inheritable
_subprocess.DUPLICATE_SAME_ACCESS)
WindowsError: [Error 6] The handle is invalid
Adding my source code ... it is the last line that is creating a problem. 添加我的源代码 ...这是造成问题的最后一行。
I do have LaTeX installed through texniccenter
but i'm not sure how to modify the settings to make it work with this code (sorry I'm new to this!). 我确实通过texniccenter
安装了LaTeX,但是我不确定如何修改设置以使其与此代码一起工作(对不起,我是新手!)。
from cvxpy import *
import numpy
import matplotlib.pyplot as plt
from matplotlib import rcParams
# Problem data.
numpy.random.seed(1)
PGRIDMAX = 1000 #kw
PPVCAP = 200 #kw
PLOADPEAK = 500 #kw
PRICEMAX = .5 #$/kwh
QBATTCAP = 1000 #kwh
PBATTCAP = 500 #kw
QMIN = 0.2 #DOD
QMAX = 0.9 #DOD
ETAQ = 0.9 #storage efficiency
ETAP = 0.85 #charging efficiency
nt = 20
PPVMAX = -PPVCAP*numpy.random.random(nt)
PLOADMAX = PLOADPEAK*numpy.random.random(nt)
PRICE = PRICEMAX*numpy.random.randn(nt)
# Construct the problem.
pgrid = Variable(nt)
pload = Variable(nt)
ppv = Variable(nt)
pbatt = Variable(nt)
qbatt = Variable(nt)
objective = Minimize(sum_squares(mul_elemwise(PRICE,pgrid)))
constraints = [pgrid == pload + ppv + pbatt, abs(pgrid) <= PGRIDMAX,
PPVMAX <= ppv, ppv <= 0,
0 <= pload, pload <= PLOADMAX,
qbatt[1:] == ETAQ*qbatt[:nt-1] + ETAP*pbatt[:nt-1],
QMIN*QBATTCAP <= qbatt, qbatt <= QMAX*QBATTCAP,
-PBATTCAP <= pbatt, pbatt <= PBATTCAP
]
prob = Problem(objective, constraints)
# The optimal objective is returned by prob.solve().
result = prob.solve(solver=CVXOPT)
# The optimal value for x is stored in x.value.
print pgrid.value
# The optimal Lagrange multiplier for a constraint
# is stored in constraint.dual_value.
# print constraints[0].dual_value
print "status:", prob.status
print "optimal value", prob.value
# Show plot inline in ipython.
#%matplotlib inline
# Plot properties.
plt.rc('text', usetex=True)
plt.rc('font', family='serif')
#
# First Figure:
#
#plt.figure(figsize=(6, 6))
#plt.scatter(np.array(loc[:, 0]), np.array(loc[:, 1]), \
# s=30, facecolors='none', edgecolors='b')
#plt.title('Antenna Locations', fontsize=16)
#plt.tight_layout()
#plt.show()
#
# Second Plot:
ppvarray = numpy.bmat(ppv.value)
pgridarray = numpy.bmat(pgrid.value)
plt.figure(figsize=(6,6))
#ymin, ymax = -40, 0
plt.plot(numpy.arange(nt), numpy.array(numpy.abs(pgridarray)), 'b-')
plt.xlabel('time', fontsize=16)
plt.ylabel('$P__P_V$ in kWh', fontsize=16)
#plt.ylim(ymin, ymax)
#plt.tight_layout()
plt.show()
rcParams
output: rcParams
输出:
agg.path.chunksize: 0
animation.avconv_args:
animation.avconv_path: avconv
animation.bitrate: -1
animation.codec: mpeg4
animation.convert_args:
animation.convert_path: convert
animation.ffmpeg_args:
animation.ffmpeg_path: ffmpeg
animation.frame_format: png
animation.mencoder_args:
animation.mencoder_path: mencoder
animation.writer: ffmpeg
axes.axisbelow: False
axes.color_cycle: ['b', 'g', 'r', 'c', 'm', 'y', 'k']
axes.edgecolor: k
axes.facecolor: w
axes.formatter.limits: [-7, 7]
axes.formatter.use_locale: False
axes.formatter.use_mathtext: False
axes.grid: False
axes.hold: True
axes.labelcolor: k
axes.labelsize: medium
axes.labelweight: normal
axes.linewidth: 1.0
axes.titlesize: large
axes.unicode_minus: True
axes.xmargin: 0
axes.ymargin: 0
axes3d.grid: True
backend: Qt4Agg
backend.qt4: PyQt4
backend_fallback: True
contour.negative_linestyle: dashed
datapath: C:\Python27\lib\site-packages\matplotlib\mpl-data
docstring.hardcopy: False
examples.directory:
figure.autolayout: False
figure.dpi: 80
figure.edgecolor: w
figure.facecolor: 0.75
figure.figsize: [8.0, 6.0]
figure.frameon: True
figure.max_open_warning: 20
figure.subplot.bottom: 0.1
figure.subplot.hspace: 0.2
figure.subplot.left: 0.125
figure.subplot.right: 0.9
figure.subplot.top: 0.9
figure.subplot.wspace: 0.2
font.cursive: ['Apple Chancery', 'Textile', 'Zapf Chancery', 'Sand', 'cursive']
font.family: ['serif']
font.fantasy: ['Comic Sans MS', 'Chicago', 'Charcoal', 'ImpactWestern', 'fantasy']
font.monospace: ['Bitstream Vera Sans Mono', 'DejaVu Sans Mono', 'Andale Mono', 'Nimbus Mono L', 'Courier New', 'Courier', 'Fixed', 'Terminal', 'monospace']
font.sans-serif: ['Bitstream Vera Sans', 'DejaVu Sans', 'Lucida Grande', 'Verdana', 'Geneva', 'Lucid', 'Arial', 'Helvetica', 'Avant Garde', 'sans-serif']
font.serif: ['Bitstream Vera Serif', 'DejaVu Serif', 'New Century Schoolbook', 'Century Schoolbook L', 'Utopia', 'ITC Bookman', 'Bookman', 'Nimbus Roman No9 L', 'Times New Roman', 'Times', 'Palatino', 'Charter', 'serif']
font.size: 12
font.stretch: normal
font.style: normal
font.variant: normal
font.weight: normal
grid.alpha: 1.0
grid.color: k
grid.linestyle: :
grid.linewidth: 0.5
image.aspect: equal
image.cmap: jet
image.interpolation: bilinear
image.lut: 256
image.origin: upper
image.resample: False
interactive: False
keymap.all_axes: a
keymap.back: ['left', 'c', 'backspace']
keymap.forward: ['right', 'v']
keymap.fullscreen: ('f', 'ctrl+f')
keymap.grid: g
keymap.home: ['h', 'r', 'home']
keymap.pan: p
keymap.quit: ('ctrl+w', 'cmd+w')
keymap.save: ('s', 'ctrl+s')
keymap.xscale: ['k', 'L']
keymap.yscale: l
keymap.zoom: o
legend.borderaxespad: 0.5
legend.borderpad: 0.4
legend.columnspacing: 2.0
legend.fancybox: False
legend.fontsize: large
legend.frameon: True
legend.handleheight: 0.7
legend.handlelength: 2.0
legend.handletextpad: 0.8
legend.isaxes: True
legend.labelspacing: 0.5
legend.loc: upper right
legend.markerscale: 1.0
legend.numpoints: 2
legend.scatterpoints: 3
legend.shadow: False
lines.antialiased: True
lines.color: b
lines.dash_capstyle: butt
lines.dash_joinstyle: round
lines.linestyle: -
lines.linewidth: 1.0
lines.marker: None
lines.markeredgewidth: 0.5
lines.markersize: 6
lines.solid_capstyle: projecting
lines.solid_joinstyle: round
mathtext.bf: serif:bold
mathtext.cal: cursive
mathtext.default: it
mathtext.fallback_to_cm: True
mathtext.fontset: cm
mathtext.it: serif:italic
mathtext.rm: serif
mathtext.sf: sans\-serif
mathtext.tt: monospace
patch.antialiased: True
patch.edgecolor: k
patch.facecolor: b
patch.linewidth: 1.0
path.effects: []
path.simplify: True
path.simplify_threshold: 0.111111111111
path.sketch: None
path.snap: True
pdf.compression: 6
pdf.fonttype: 3
pdf.inheritcolor: False
pdf.use14corefonts: False
pgf.debug: False
pgf.preamble: ['']
pgf.rcfonts: True
pgf.texsystem: xelatex
plugins.directory: .matplotlib_plugins
polaraxes.grid: True
ps.distiller.res: 6000
ps.fonttype: 3
ps.papersize: letter
ps.useafm: False
ps.usedistiller: False
savefig.bbox: None
savefig.directory: ~
savefig.dpi: 100
savefig.edgecolor: w
savefig.extension: png
savefig.facecolor: w
savefig.format: png
savefig.frameon: True
savefig.jpeg_quality: 95
savefig.orientation: portrait
savefig.pad_inches: 0.1
svg.embed_char_paths: True
svg.fonttype: path
svg.image_inline: True
svg.image_noscale: False
text.antialiased: True
text.color: k
text.dvipnghack: None
text.hinting: True
text.hinting_factor: 8
text.latex.preamble: ['']
text.latex.preview: False
text.latex.unicode: False
text.usetex: True
timezone: UTC
tk.pythoninspect: False
tk.window_focus: False
toolbar: toolbar2
verbose.fileo: sys.stdout
verbose.level: silent
webagg.open_in_browser: True
webagg.port: 8988
webagg.port_retries: 50
xtick.color: k
xtick.direction: in
xtick.labelsize: medium
xtick.major.pad: 4
xtick.major.size: 4
xtick.major.width: 0.5
xtick.minor.pad: 4
xtick.minor.size: 2
xtick.minor.width: 0.5
ytick.color: k
ytick.direction: in
ytick.labelsize: medium
ytick.major.pad: 4
ytick.major.size: 4
ytick.major.width: 0.5
ytick.minor.pad: 4
ytick.minor.size: 2
ytick.minor.width: 0.5
I fixed it! 我修好了它! It turns out the culprit was using the 64 bit version of Miktex... 原来,罪魁祸首是使用64位版本的Miktex ...
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