[Matplotlib-users] interrupted line with maskedarray (normal behavior ?)
Hi, I've just start playing with maskedarray (the new implementation) using fresh svn matplotib (0_91 maintenance). Plotting masked array does not behave as I would have expected. Indeed when drawing a line graph the masked walues interrupted the line (see attach example). I would prefer to see a continues line... Is it the expected behavior? Is there a way to change it? Thanks in advance, David import pylab import maskedarray as ma x = ma.arange(10) y = ma.sin(x/10.0) y[2]=ma.masked pylab.plot(x,y,'-o') pylab.show() inline: interupt.png- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] interrupted line with maskedarray (normal behavior ?)
David Trémouilles wrote: Hi, I've just start playing with maskedarray (the new implementation) using fresh svn matplotib (0_91 maintenance). Plotting masked array does not behave as I would have expected. Indeed when drawing a line graph the masked walues interrupted the line (see attach example). David: Yes, this is the correct behavior. The masked values are treated as missing data. No attempt is made to fill, or interpolate, the missing data. I would prefer to see a continues line... Then you should interpolate the missing values yourself. I think it would be unwise for matplotlib to guess how you might want to do that. -Jeff Is it the expected behavior? Is there a way to change it? Thanks in advance, David - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Jeffrey S. Whitaker Phone : (303)497-6313 NOAA/OAR/CDC R/PSD1FAX : (303)497-6449 325 BroadwayBoulder, CO, USA 80305-3328 - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] scatter plot onto background image
On Feb 10, 2008 9:43 AM, John Hunter [EMAIL PROTECTED] wrote: I want to create a scatter plot onto a background image. Anybody could help me?Thank you! The mri_demo.py example in the matplotlib/examples in the src distribution illustrates this. Sorry -- wrong example. The example I was thinking of is examples/image_demo2.py, also at http://matplotlib.sf.net/examples/image_demo2.py but if you want to run it you will need to get the matplotlib src directory which also has the data file for the CT image JDH - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] interrupted line with maskedarray (normal behavior ?)
Thanks Jeff, I think now I get the purpose of maskedearray the way it is used in matplotlib. I have a slightly different objective: I just want to remove outliers from my curves. I think I will still play with maskedarray and used the compressed() function before 'sending' to matplotlib. Any comments on that, any other idea? Thanks, David Jeff Whitaker a écrit : David Trémouilles wrote: Hi, I've just start playing with maskedarray (the new implementation) using fresh svn matplotib (0_91 maintenance). Plotting masked array does not behave as I would have expected. Indeed when drawing a line graph the masked walues interrupted the line (see attach example). David: Yes, this is the correct behavior. The masked values are treated as missing data. No attempt is made to fill, or interpolate, the missing data. I would prefer to see a continues line... Then you should interpolate the missing values yourself. I think it would be unwise for matplotlib to guess how you might want to do that. -Jeff Is it the expected behavior? Is there a way to change it? Thanks in advance, David - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] interrupted line with maskedarray (normal behavior ?)
On Sunday 10 February 2008 12:40:38 David Trémouilles wrote: I have a slightly different objective: I just want to remove outliers from my curves. I think I will still play with maskedarray and used the compressed() function before 'sending' to matplotlib. Any comments on that, any other idea? So, you have two arrays x and y, with missing values in y that you don't want to plot ? Assuming that your arrays are 1D, you can try something like: plot(x[logical_not(y.mask)], y.compressed()) in order to ensure that the x and y to be plotted have the same size. Note that in this simple case, you don't need masked arrays, you just want to plot point satisfying a given condition, right ? So: condition = (y=min_value) (y= max_value) plot(x[condition],y[condition]) will give the same results. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] interrupted line with maskedarray (normal behavior ?)
Thank you very much Pierre! You made me discover boolean index (numpy is fantastic !) In the mean time, I now understand the purpose of maskedarray that I totally missed at a first sight. Thanks to all of you, David Pierre GM a écrit : On Sunday 10 February 2008 12:40:38 David Trémouilles wrote: I have a slightly different objective: I just want to remove outliers from my curves. I think I will still play with maskedarray and used the compressed() function before 'sending' to matplotlib. Any comments on that, any other idea? So, you have two arrays x and y, with missing values in y that you don't want to plot ? Assuming that your arrays are 1D, you can try something like: plot(x[logical_not(y.mask)], y.compressed()) in order to ensure that the x and y to be plotted have the same size. Note that in this simple case, you don't need masked arrays, you just want to plot point satisfying a given condition, right ? So: condition = (y=min_value) (y= max_value) plot(x[condition],y[condition]) will give the same results. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] interrupted line with maskedarray (normal behavior ?)
On Sunday 10 February 2008 13:23:13 David Trémouilles wrote: Thank you very much Pierre! You made me discover boolean index (numpy is fantastic !) In the mean time, I now understand the purpose of maskedarray that I totally missed at a first sight. You're quite welcome. Masked arrays are great when you need a way to flag invalid or missing data. For simpler cases, boolean indexing can be faster and easier to understand. And now, for a shameless plug: if you work with series indexed with time, you might be interested in the timeseries package (available as a scikit in http://svn.scipy.org/svn/scikits/trunk/timeseries/). The package relies on the new numpy.ma package. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] font
I would like to be able to use Cambria font (http://en.wikipedia.org/wiki/Cambria_(typeface)) for all text on my charts. I am adding these charts to a MS Word 2007 document written in the same font. I tried to add Cambria as the fist string in rcsetup.py | defaultParams | 'font.serif'. That didn't work. Can I use this font for the charts? - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] interrupted line with maskedarray (normal behavior ?)
On Sun, 10 Feb 2008, David Trémouilles apparently wrote: I have a slightly different objective: I just want to remove outliers Do you just want to filter out the outliers? newdata = [datum for datum in data if not isoutlier(datum)] You can define ``isoutlier`` to return True for outliers in your data. Apologies if this proves OT. fwiw, Alan Isaac - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] searchable text chart format
The following script creates a chart in pdf format. All the text on the chart
is searchable. I need to create a chart which will be put in a MS Word 2007
document (as part of a much larger document) and then converted to a Pdf.
Which format should my chart be and which backend should I use? Thus far, I
have been using Agg and putting in pngs...the quality is great but they are not
searchable! Thanks.
=
import matplotlib as ML
ML.use('Pdf')
import pylab as PL
fig = PL.figure()
ax1 = fig.add_subplot(111)
lstX = range(1,100)
lstY = map(lambda x:PL.sin(x/PL.pi),lstX)
ax1.plot(lstX, lstY, color=(0.87,0.0,0.0), lw=2, alpha=0.6)
ax1.set_ylabel('control of line styles, font properties, axes properties')
ax1.set_xlabel('trys to make easy things easy and hard things')
ax1.set_title('python 2D plotting library which produces', weight='bold',
size='large')
fig.savefig('out', dpi=72)
=
-
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