Michael Droettboom wrote:
Can you provide a complete, standalone example that reproduces the
problem. Otherwise all I can do is guess.
The usual culprit is forgetting to close figures after you're done with
them.
Thanks, I learned that through matplotlib-1.3.0 give spit over me a warning
message some weeks
ago. Yes, i do call _figure.clear() and pylab.clf() but only after the
savefig() returns, which
is not the case here. Also use gc.collect() a lot through the code, especially
before and after
I draw every figure. That is not enough here.
from itertools import izip, imap, ifilter
import pylab
import matplotlib
# Force matplotlib not to use any X-windows backend.
matplotlib.use('Agg')
import pylab
F = pylab.gcf()
# convert the view of numpy array to tuple
#
http://matplotlib.1069221.n5.nabble.com/RendererAgg-int-width-int-height-dpi-debug-False-ValueError-width-and-height-must-each-be-below-32768-td27756.html
DefaultSize = tuple(F.get_size_inches())
def draw_hist2d_plot(filename, mydata_x, mydata_y, colors, title_data,
xlabel_data, ylabel_data, legends, legend_loc='upper right',
legend_bbox_to_anchor=(1.0, 1.0), legend_ncol=None, xmin=None, xmax=None,
ymin=None, ymax=None, fontsize=10, legend_fontsize=8, dpi=100,
tight_layout=False, legend_inside=False, objsize=0.1):
# hist2d(x, y, bins = None, range=None, weights=None, cmin=None, cmax=None
**kwargs)
if len(mydata_x) != len(mydata_y):
raise ValueError, "%s: len(mydata_x) != len(mydata_y): %s != %s" %
(filename, len(mydata_x), len(mydata_y))
if colors and len(mydata_x) != len(colors):
sys.stderr.write("Warning: draw_hist2d_plot(): %s: len(mydata_x) !=
len(colors): %s != %s.\n" % (filename, len(mydata_x), len(colors)))
if colors and legends and len(colors) != len(legends):
sys.stderr.write("Warning: draw_hist2d_plot(): %s, len(colors) !=
len(legends): %s != %s.\n" % (filename, len(colors), len(legends)))
if mydata_x and mydata_y and filename:
if legends:
if not legend_ncol:
_subfigs, _ax1_num, _ax2_num, _legend_ncol = get_ncol(legends,
fontsize=legend_fontsize)
else:
_subfigs, _ax1_num, _ax2_num, _legend_ncol = 3, 213, 313,
legend_ncol
else:
_subfigs, _ax1_num, _legend_ncol = 3, 313, 0
set_my_pylab_defaults()
pylab.clf()
_figure = pylab.figure()
_figure.clear()
_figure.set_tight_layout(True)
gc.collect()
if legends:
# do not crash on too tall figures
if 8.4 * _subfigs < 200:
_figure.set_size_inches(11.2, 8.4 * (_subfigs + 1))
else:
# _figure.set_size_inches() silently accepts a large value but
later on _figure.savefig() crashes with:
# ValueError: width and height must each be below 32768
_figure.set_size_inches(11.2, 200)
sys.stderr.write("Warning: draw_hist2d_plot(): Wanted to set %s
figure height to %s but is too high, forcing %s instead. You will likely get an
incomplete image.\n" % (filename, 8.4 * _subfigs, 200))
if myoptions.debug > 5: print "Debug: draw_hist2d_plot(): Changed %s
figure size to: %s" % (filename, str(_figure.get_size_inches()))
_ax1 = _figure.add_subplot(_ax1_num)
_ax2 = _figure.add_subplot(_ax2_num)
else:
_figure.set_size_inches(11.2, 8.4 * 2)
_ax1 = _figure.gca()
if myoptions.debug > 5: print "Debug: draw_hist2d_plot(): Changed %s figure
size to: %s" % (filename, str(_figure.get_size_inches()))
_series = []
#for _x, _y, _c, _l in izip(mydata_x, mydata_y, colors, legends):
for _x, _y, _c in izip(mydata_x, mydata_y, colors):
# _Line2D = _ax1.plot(_x, _y) # returns Line2D object
_my_PathCollection = _ax1.scatter(_x, _y, color=_c, s=objsize) # ,
label=_l) # returns PathCollection object
_series.append(_my_PathCollection)
if legends:
#for _x, _y, _c, _l in izip(mydata_x, mydata_y, colors, legends):
for _x, _y, _c in izip(mydata_x, mydata_y, colors):
_my_PathCollection = _ax1.scatter(_x, _y, color=_c, s=objsize)
# , label=_l)
_series.append(_my_PathCollection)
_ax2.legend(_series, legends, loc='upper left',
bbox_to_anchor=(0,0,1,1), borderaxespad=0., ncol=_legend_ncol, mode='expand',
fontsize=legend_fontsize)
_ax2.set_frame_on(False)
_ax2.tick_params(bottom='off', left='off', right='off', top='off')
pylab.setp(_ax2.get_yticklabels(), visible=False)
pylab.setp(_ax2.get_xticklabels(), visible=False)
else:
for _x, _y, _c in izip(mydata_x, mydata_y, colors):
_ax1.scatter(_x, _y, color=_c, s=objsize) #, marker='^') #
keeps eating memory in:
#
# draw_hist2d_plot(filename, _data_xrow, _data_yrow,
_my_colors, _title, _xlabel, _ylabel, [], xmin=None, xmax=None, ymin=None,
ymax=None, fontsize=10, dpi=100)
# File "/blah.py", line 14080, in draw_hist2d_plot
# _ax1.scatter(_x, _y, color=_c, s=objsize) #, marker='^')
# File
"/usr/lib64/python2.7/site-packages/matplotlib/axes.py", line 6247, in scatter
# self._process_unit_info(xdata=x, ydata=y, kwargs=kwargs)
# File
"/usr/lib64/python2.7/site-packages/matplotlib/axes.py", line 1685, in
_process_unit_info
# self.xaxis.update_units(xdata)
# File
"/usr/lib64/python2.7/site-packages/matplotlib/axis.py", line 1332, in
update_units
# converter = munits.registry.get_converter(data)
# pylab.subplots_adjust(left = (5/25.4)/_figure.xsize, bottom =
(4/25.4)/_figure.ysize, right = 1 - (1/25.4)/_figure.xsize, top = 1 -
(3/25.4)/_figure.ysize)
_ax1.set_xlabel(xlabel_data, fontsize=fontsize)
_ax1.set_ylabel(ylabel_data, fontsize=fontsize)
_ax1.set_xmargin(0.05)
_ax1.set_ymargin(0.05)
_ax1.set_autoscale_on(False)
set_limits(_ax1, xmin, xmax, ymin, ymax)
if fontsize == 10:
_ax1.set_title('\n'.join(wrap(title_data, 100)),
fontsize=fontsize+2)
elif fontsize == 12:
_ax1.set_title('\n'.join(wrap(title_data, 90)),
fontsize=fontsize+2)
else:
_ax1.set_title('\n'.join(wrap(title_data, 100)),
fontsize=fontsize+2)
if legends:
_figure.savefig(filename, dpi=100) #, bbox_inches='tight')
del(_my_PathCollection)
del(_ax2)
else:
_figure.savefig(filename, dpi=100)
del(_series)
del(_ax1)
_figure.clear()
del(_figure)
pylab.clf()
pylab.close()
# pylab.rcdefaults()
gc.collect()
That's the whole function. I used to suspect _ax1.scatter() in the past but
probably
only because I hit the memory problems earlier. That is worked around now by
using
on disk bsddb3 file or gdbm somewhere upstream. This particular function is
nevertheless
fed with just a huge list numbers, and that is not the issue in itself.
I would be glad if I could tell matplotlib: Here you have 100 colors, use them
for all data
as you wish, just spread them evenly over the whole dataset so that first
1/100th of the data
gets the first color, second 1/100th of the data gets the second color, and so
on. Optionally,
if you would like to say: use the 100 colors in cycles for all data points,
just loop through
the colors as long as you need some. In both scenarios, I could have avoided
the two for loops
in the above code and necessity to generate those objects. Same for legend
stuff.
Martin
Mike
On 10/10/2013 09:05 AM, Martin MOKREJŠ wrote:
Hi,
rendering some of my charts takes almost 50GB of RAM. I believe below is a
stracktrace
of one such situation when it already took 15GB. Would somebody comments on
what is
matplotlib doing at the very moment? Why the recursion?
The charts had to have 262422 data points in a 2D scatter plot, each point
has assigned
its own color. They are in batches so that there are 153 distinct colors but
nevertheless,
I assigned to each data point a color value. There are 153 legend items also
(one color
won't be used).
^CTraceback (most recent call last):
...
_figure.savefig(filename, dpi=100)
File "/usr/lib64/python2.7/site-packages/matplotlib/figure.py", line 1421,
in savefig
self.canvas.print_figure(*args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/backend_bases.py", line
2220, in print_figure
**kwargs)
File
"/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line
505, in print_png
FigureCanvasAgg.draw(self)
File
"/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line
451, in draw
self.figure.draw(self.renderer)
File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/figure.py", line 1034,
in draw
func(*args)
File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/axes.py", line 2086, in
draw
a.draw(renderer)
File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/collections.py", line
718, in draw
return Collection.draw(self, renderer)
File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/collections.py", line
276, in draw
offsets, transOffset, self.get_facecolor(), self.get_edgecolor(),
File "/usr/lib64/python2.7/site-packages/matplotlib/collections.py", line
551, in get_edgecolor
return self._edgecolors
KeyboardInterrupt
^CError in atexit._run_exitfuncs:
Traceback (most recent call last):
File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
func(*targs, **kargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/_pylab_helpers.py",
line 90, in destroy_all
gc.collect()
KeyboardInterrupt
Error in sys.exitfunc:
Traceback (most recent call last):
File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
func(*targs, **kargs)
File "/usr/lib64/python2.7/site-packages/matplotlib/_pylab_helpers.py",
line 90, in destroy_all
gc.collect()
KeyboardInterrupt
^C
Clues what is the code doing? I use mpl-1.3.0.
Thank you,
Martin
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