Re: [Matplotlib-users] X Window System error

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

On 2012/10/02 4:12 AM, Mic wrote:
> Hi Eric,
> I have a dataset which contains about 4600 values.
>
> Is it possible to display 4600 values with a bar char and labels?
>
> Thank you in advance.

Mic,

I don't think so, as a practical matter.  A screen doesn't even have 
that many pixels of width.

Eric

>
>
>
> On Tue, Oct 2, 2012 at 4:04 PM, Eric Firing <ef...@ha...
> <mailto:ef...@ha...>> wrote:
>
>     On 2012/10/01 7:28 PM, Mic wrote:
>      > Hi,
>      >
>      > I have got the following error with the following code:
>      > /$ python mpl.py/ <http://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.
>      >
>      >
>      >
>      >
>     ------------------------------------------------------------------------------
>      > Don't let slow site performance ruin your business. Deploy New
>     Relic APM
>      > Deploy New Relic app performance management and know exactly
>      > what is happening inside your Ruby, Python, PHP, Java, and .NET app
>      > Try New Relic at no cost today and get our sweet Data Nerd shirt too!
>      > http://p.sf.net/sfu/newrelic-dev2dev
>      >
>      >
>      >
>      > _______________________________________________
>      > Matplotlib-users mailing list
>      > Mat...@li...
>     <mailto:Mat...@li...>
>      > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>      >
>
>
>     ------------------------------------------------------------------------------
>     Don't let slow site performance ruin your business. Deploy New Relic APM
>     Deploy New Relic app performance management and know exactly
>     what is happening inside your Ruby, Python, PHP, Java, and .NET app
>     Try New Relic at no cost today and get our sweet Data Nerd shirt too!
>     http://p.sf.net/sfu/newrelic-dev2dev
>     _______________________________________________
>     Matplotlib-users mailing list
>     Mat...@li...
>     <mailto:Mat...@li...>
>     https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>