Re: [Matplotlib-users] X Window System error

[Eric F. <ef...@ha...>]

On 2012/10/01 7:28 PM, Mic wrote:
> Hi,
>
> I have got the following error with the following code:
> /$ python mpl.py/
> /Traceback (most recent call last):/
> /  File
> "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_gtk.py",
> line 398, in expose_event/
> /    self._render_figure(self._pixmap, w, h)/
> /  File
> "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_gtkagg.py",
> line 75, in _render_figure/
> /    FigureCanvasAgg.draw(self)/
> /  File
> "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py",
> line 416, in draw/
> /    self.renderer = self.get_renderer()/
> /  File
> "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py",
> line 435, in get_renderer/
> /    self.renderer = RendererAgg(w, h, self.figure.dpi)/
> /  File
> "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py",
> line 72, in __init__/
> /    self._renderer = _RendererAgg(int(width), int(height), dpi,
> debug=False)/
> /ValueError: width and height must each be below 32768/
> /The program 'mpl.py' received an X Window System error./
> /This probably reflects a bug in the program./
> /The error was 'BadAlloc (insufficient resources for operation)'./
> /  (Details: serial 486 error_code 11 request_code 53 minor_code 0)/
> /  (Note to programmers: normally, X errors are reported asynchronously;/
> /   that is, you will receive the error a while after causing it./
> /   To debug your program, run it with the --sync command line/
> /   option to change this behavior. You can then get a meaningful/
> /   backtrace from your debugger if you break on the gdk_x_error()
> function.)/
>
> With the following code:
> /import random /
> /import matplotlib.pyplot as plt /
> //
> /coverages = [random.randint(1,10)*2] * 4605 /
> /contig_names = ['AAB0008r'] * len(coverages) /
> /# Set the figure size /
> /#fig = plt.figure(1, [20, 2]) /
> /fig = plt.figure(figsize=(int(len(coverages)*0.1), 4)) /
> //
> /ax = fig.add_subplot(111) /
> //
> /# Set the x-axis limit /
> /#ax.set_xlim(-1,100) /
> /ax.set_xlim(0,len(coverages)) /
> /#ax.set_ylim(0,3) /
> /ax.yaxis.grid(True, linestyle='-', which='major', color='grey',
> alpha=0.5) /
> //
> /ind = range(len(coverages)) /
> /rects = ax.bar(ind, coverages, width=0.1, align='center',
> color='thistle') /
> /ax.set_xticks(ind) /
> /#ax.set_xticklabels(contig_names)/
> /#ax.tick_params(axis='both', which='major', labelsize=10)/
> /#ax.tick_params(axis='both', which='minor', labelsize=8)/
> /
> /
> /
> /
> /#function to auto-rotate the x axis labels/
> /fig.autofmt_xdate()/
> /plt.setp(ax.get_xticklabels(), fontsize=8, rotation='vertical')/
> /plt.show()/
>
> How is it possible to get big charts?

It looks like you are trying to make a figure that is 460 inches by 4 
inches.  How do you expect to display or print it?  I think displaying 
it is out of the question, so you would need to use a non-interactive 
backend.  I don't know whether ps or pdf can handle those sorts of 
dimensions.

Eric

>
> Thank you in advance.
>
>
>
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