Re: [Matplotlib-users] different behaviour in Windows and Linux
Hi Gary,
I just tested your example, also on Intrepid with 0.98.3, and I get the
exact same behaviour as you, with white pixels in the left column. But I
have no idea why, sorry.
Sünnje
-Original Message-
From: Gary Ruben [mailto:[EMAIL PROTECTED]
Sent: Tue 12/2/2008 11:13
To: matplotlib-users@lists.sourceforge.net
Subject: [Matplotlib-users] different behaviour in Windows and Linux
I'm wondering whether someone can reproduce the following problem I'm
seeing in Ubuntu Intrepid.
I often use matplotlib to save images created with imshow to take
advantage of matplotlib's colour maps. I've noticed that the behaviour
is different for 0.98.3 between Windows XP-32 and Ubuntu Intrepid. I
don't remember seeing this problem with earlier versions. This minimal
example demonstrates the problem:
--
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.cm as cm
px = 3
rcFig = {'figsize': (1, 1),
'dpi': px,
'subplot.bottom': 0,
'subplot.left': 0,
'subplot.right': 1,
'subplot.top': 1,
}
plt.rc('figure', **rcFig)
a = np.ones((px, px))
plt.axis('off')
plt.imshow(a, cmap=cm.gray)
plt.savefig('mpl_out.png', dpi=px)
--
In Windows I get the correct behaviour - in this case a 3x3 image with
all black pixels:
bbb
bbb
bbb
However, in Linux the leftmost column of pixels is white
wbb
wbb
wbb
By the way, I think an imsave function that just saved an array as an
image with a specified colourmap and clims would be a nice addition to
matplotlib.image. Is there another way to achieve the same 1-to-1 array
element-to-pixel image saving applying colourmaps and clims?
thanks,
Gary R.
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[Matplotlib-users] Cygwin1.dll error import pyplot
Hi all, I've searched the mailing archive, and I can't find an anwser to my problem : i'm running Python2.5 on a WinXP32 box. I just reinstalled cygwin to exclude a version-problem. Matplotlib version is 0.98.3 (got from easy_install matplotlib command) i'm just trying this : from matplotlib.pyplot import * and the answer is : 3 [main] ? (2808) C:\Python25\pythonw.exe: *** fatal error - Incompatible cygwin .dll -- incompatible per_process info 0 != 168 bom... I really don't know how to solve this... Thanks a lot in advance for your help ! Thomas ** Thomas Lecocq Geologist Ph.D.Student (Seismology) Royal Observatory of Belgium ** - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] different behaviour in Windows and Linux
I'm wondering whether someone can reproduce the following problem I'm
seeing in Ubuntu Intrepid.
I often use matplotlib to save images created with imshow to take
advantage of matplotlib's colour maps. I've noticed that the behaviour
is different for 0.98.3 between Windows XP-32 and Ubuntu Intrepid. I
don't remember seeing this problem with earlier versions. This minimal
example demonstrates the problem:
--
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.cm as cm
px = 3
rcFig = {'figsize': (1, 1),
'dpi': px,
'subplot.bottom': 0,
'subplot.left': 0,
'subplot.right': 1,
'subplot.top': 1,
}
plt.rc('figure', **rcFig)
a = np.ones((px, px))
plt.axis('off')
plt.imshow(a, cmap=cm.gray)
plt.savefig('mpl_out.png', dpi=px)
--
In Windows I get the correct behaviour - in this case a 3x3 image with
all black pixels:
bbb
bbb
bbb
However, in Linux the leftmost column of pixels is white
wbb
wbb
wbb
By the way, I think an imsave function that just saved an array as an
image with a specified colourmap and clims would be a nice addition to
matplotlib.image. Is there another way to achieve the same 1-to-1 array
element-to-pixel image saving applying colourmaps and clims?
thanks,
Gary R.
-
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Re: [Matplotlib-users] different behaviour in Windows and Linux
I just realised that the example I gave may not be the best since it's not obvious what the autoscaling will do when all array values are equal. Nevertheless, even when the array contains a range of values and I use a greyscale colourmap, I'm seeing the leftmost pixel column set to all white when the array values in that column are all zeros and the image is written in Linux, whereas it's black when written in Windows. Gary - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] pylab or not... crashes or not
I am indeed using ipython 0.8.1. Will try to upgrade and see how it goes. Indeed this looks like the deadlocks people mentioned, within, as Xavier emphasised, no way to CTRL-C it to kill it. thanks for the tips Eric Yannick Copin wrote: Salut Eric, Date: Mon, 01 Dec 2008 20:08:00 +0100 From: Eric Emsellem [EMAIL PROTECTED] Subject: [Matplotlib-users] pylab or not... crashes or not - when I start a session with ipython -pylab I often get crashes with my session. When I mean often, it means really often like once everything 1/2h or so. A crash means that the command I just sent gets stuck and the only way for me to get it back is to kill the PID of the ipython process... [...] IPython 0.8.1 -- An enhanced Interactive Python. I would say the pb is actually coming from ipython. I experienced it while using ipython-0.8.1, but I guess it disappeared starting with ipython-0.8.3 (see http://ipython.scipy.org/moin/WhatsNew083: Multithreaded shells (used e.g. by matplotlib interaction) have been improved, reducing the possibility of corner case deadlocks.). I'm now using 0.8.4 and I don't remember I ever had this pb again. See you! (and congrats ;-) ) - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] different behaviour in Windows and Linux
There is an explicit offset of one pixel on the left when it sets up a
clip box in Agg. I don't know why this is there, but it dates back to
0.98.0, and earlier versions did something completely different. I can
only guess it was to compensate for an earlier bug in the precise
drawing of the axes rectangle. I can't explain why it would have
different behavior on Windows vs. Linux, though.
I have fixed this in SVN r6465 and am including a patch below (which
unfortunately requires a recompile).
Cheers,
Mike
Modified: trunk/matplotlib/src/_backend_agg.cpp
===
--- trunk/matplotlib/src/_backend_agg.cpp 2008-12-01 19:35:39 UTC (rev
6465)
+++ trunk/matplotlib/src/_backend_agg.cpp 2008-12-02 15:27:23 UTC (rev
6466)
@@ -312,8 +312,8 @@
double l, b, r, t;
if (py_convert_bbox(cliprect.ptr(), l, b, r, t)) {
-rasterizer.clip_box(int(mpl_round(l)) + 1, height - int(mpl_round(b)),
-int(mpl_round(r)), height - int(mpl_round(t)));
+rasterizer.clip_box(int(mpl_round(l)), height - int(mpl_round(b)),
+int(mpl_round(r)), height - int(mpl_round(t)));
}
_VERBOSE(RendererAgg::set_clipbox done);
-
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Re: [Matplotlib-users] Ovality of a perturbed circular path
On Tue, Dec 2, 2008 at 7:44 AM, Nils Wagner [EMAIL PROTECTED] wrote: Hi all, I would like to visualize the ovality of a perturbed circular path by a polar plot. How can I improve the view wrt to scaling and ticks ? ylim(0, 2) yticks(arange(0, 2, 0.25)) Thank you for your reply. It is on the right path. Is it possible to restrict the view to an annulus 0.75 r 1.25 ? Sorry, I'm not sure about that. I've cc'd the list incase anyone else can help. Cheers, Matt -- Matt Foster | http://hackerific.net - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] pylab or not... crashes or not
Salut Eric, Date: Mon, 01 Dec 2008 20:08:00 +0100 From: Eric Emsellem [EMAIL PROTECTED] Subject: [Matplotlib-users] pylab or not... crashes or not - when I start a session with ipython -pylab I often get crashes with my session. When I mean often, it means really often like once everything 1/2h or so. A crash means that the command I just sent gets stuck and the only way for me to get it back is to kill the PID of the ipython process... [...] IPython 0.8.1 -- An enhanced Interactive Python. I would say the pb is actually coming from ipython. I experienced it while using ipython-0.8.1, but I guess it disappeared starting with ipython-0.8.3 (see http://ipython.scipy.org/moin/WhatsNew083: Multithreaded shells (used e.g. by matplotlib interaction) have been improved, reducing the possibility of corner case deadlocks.). I'm now using 0.8.4 and I don't remember I ever had this pb again. See you! (and congrats ;-) ) -- .~. Yannick COPIN (o:* Doctus cum libro /V\ Institut de physique nucleaire de Lyon (IN2P3 - France) // \\ Tel: (33/0) 472 431 968 AIM: YnCopin ICQ: 236931013 /( )\ http://snovae.in2p3.fr/ycopin/ ^`~'^ - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Cygwin1.dll error import pyplot
All right, as information for all : reinstalling cygwin from scratch, reinstalling python from scratch, and finaly matplotlib now works... Cheers, Thomas ** Thomas Lecocq Geologist Ph.D.Student (Seismology) Royal Observatory of Belgium ** From: [EMAIL PROTECTED] To: matplotlib-users@lists.sourceforge.net Date: Tue, 2 Dec 2008 12:50:24 + Subject: [Matplotlib-users] Cygwin1.dll error import pyplot Hi all, I've searched the mailing archive, and I can't find an anwser to my problem : i'm running Python2.5 on a WinXP32 box. I just reinstalled cygwin to exclude a version-problem. Matplotlib version is 0.98.3 (got from easy_install matplotlib command) i'm just trying this : from matplotlib.pyplot import * and the answer is : 3 [main] ? (2808) C:\Python25\pythonw.exe: *** fatal error - Incompatible cygwin .dll -- incompatible per_process info 0 != 168 bom... I really don't know how to solve this... Thanks a lot in advance for your help ! Thomas ** Thomas Lecocq Geologist Ph.D.Student (Seismology) Royal Observatory of Belgium ** - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] More points in polar plot than expected
Hi there, telling pyplot polar([1,2,3,4],[1,3,4,2], o) to my surprise does not give me 4 distinct points but rather some interpolated points as well. This is highly unexpected, nay, unwanted. It used to work well in Fedora 8 (don't know which version I ran there). Fedora 10 Python 2.5.2 matplotlib 0.98.1 Any ideas? /W - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] polar in a subplot
Hi all,
If I run the attached example I obtain no polar plots, but
a view like plot(t,r_1) - for what reason ?
Nils
python -i test_subplot_polar.py --verbose-helpful
$HOME=/home/nwagner
CONFIGDIR=/home/nwagner/.matplotlib
/usr/lib/python2.4/site-packages/matplotlib/__init__.py:662:
UserWarning: Bad val inputenc on line #144
text.latex.unicode : inputenc # use ucs and
inputenc LaTeX packages for handling
in file /home/nwagner/.matplotlib/matplotlibrc
Could not convert inputenc to boolean
warnings.warn('Bad val %s on line #%d\n\t%s\n\tin
file \
matplotlib data path
/usr/lib/python2.4/site-packages/matplotlib/mpl-data
loaded rc file /home/nwagner/.matplotlib/matplotlibrc
matplotlib version 0.98.3
verbose.level helpful
interactive is False
units is False
platform is linux2
Using fontManager instance from
/home/nwagner/.matplotlib/fontList.cache
backend GTKAgg version 2.5.3
findfont: Matching
:family=sans-serif:style=normal:variant=normal:weight=normal:stretch=normal:size=medium
to Bitstream Vera Sans
(/usr/lib/python2.4/site-packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf)
with score of 1.00
Found dvipng version 1.5
from pylab import subplot, polar, linspace, show
from numpy import pi, sin, cos
t = linspace(0,2*pi,20)
r_1 = (1+sin(t))
r_2 = (1+cos(t))
subplot(211)
polar(t,r_1)
subplot(212)
polar(t,r_2)
show()
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Re: [Matplotlib-users] More points in polar plot than expected
On Tue, Dec 2, 2008 at 10:12 AM, Wildemar Wildenburger [EMAIL PROTECTED] wrote: Hi there, telling pyplot polar([1,2,3,4],[1,3,4,2], o) to my surprise does not give me 4 distinct points but rather some interpolated points as well. This is highly unexpected, nay, unwanted. It used to work well in Fedora 8 (don't know which version I ran there). Fedora 10 Python 2.5.2 matplotlib 0.98.1 Any ideas? Works for me on 0.98.3 and SVN HEAD. I get 4 blue dots. Can you send an image showing the output you're getting? Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] polar in a subplot
On Tue, Dec 2, 2008 at 11:07 AM, Nils Wagner [EMAIL PROTECTED]wrote: Hi all, If I run the attached example I obtain no polar plots, but a view like plot(t,r_1) - for what reason ? You need to specify polar=True to the subplot commands. Try this: from pylab import subplot, polar, linspace, show from numpy import pi, sin, cos t = linspace(0,2*pi,20) r_1 = (1+sin(t)) r_2 = (1+cos(t)) subplot(211, polar=True) polar(t,r_1) #Or can use plot() subplot(212, polar=True) polar(t,r_2) show() Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] polar in a subplot
On Tue, 2 Dec 2008 11:14:48 -0600 Ryan May [EMAIL PROTECTED] wrote: On Tue, Dec 2, 2008 at 11:07 AM, Nils Wagner [EMAIL PROTECTED]wrote: Hi all, If I run the attached example I obtain no polar plots, but a view like plot(t,r_1) - for what reason ? You need to specify polar=True to the subplot commands. Try this: from pylab import subplot, polar, linspace, show from numpy import pi, sin, cos t = linspace(0,2*pi,20) r_1 = (1+sin(t)) r_2 = (1+cos(t)) subplot(211, polar=True) polar(t,r_1) #Or can use plot() subplot(212, polar=True) polar(t,r_2) show() Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma Hi Ryan, Thank you very much ! It would be nice to have that information in the docstring subplot(*args, **kwargs) Create a subplot command, creating axes with:: subplot(numRows, numCols, plotNum) where *plotNum* = 1 is the first plot number and increasing *plotNums* fill rows first. max(*plotNum*) == *numRows* * *numCols* The next inquiry is related to xticks. I have added xticks(linspace(0,2*pi,24,endpoint=False)) The difference between consecutive xticks is varying between 14 and 16 degrees. For what reason ? Nils attachment: polar.png- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] More points in polar plot than expected
Yeah. This is a known bug that was fixed since 0.98.1. Cheers, Mike Ryan May wrote: On Tue, Dec 2, 2008 at 10:12 AM, Wildemar Wildenburger [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Hi there, telling pyplot polar([1,2,3,4],[1,3,4,2], o) to my surprise does not give me 4 distinct points but rather some interpolated points as well. This is highly unexpected, nay, unwanted. It used to work well in Fedora 8 (don't know which version I ran there). Fedora 10 Python 2.5.2 matplotlib 0.98.1 Any ideas? Works for me on 0.98.3 and SVN HEAD. I get 4 blue dots. Can you send an image showing the output you're getting? Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] More points in polar plot than expected
On Tue, 02 Dec 2008 12:43:14 -0500 Michael Droettboom [EMAIL PROTECTED] wrote: Yeah. This is a known bug that was fixed since 0.98.1. Rats! Lets hope the Fedora guys are quick with the updating. Thanks for ending my head-banging, though. /W - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] pylab or not... crashes or not
running the last ipython version now (0.9.1), and it does not help (got stuck the same way). The difference now is that ipython provides a message: Warning: Timeout for mainloop thread exceeded switching to nonthreaded mode (until mainloop wakes up again) It seems that ipython developers did catch the issue and made this message to be delivered so that at least you can go on working with your session. However, I cannot do anything with matplotlib after that message is given, and I have to get out of the session and start again if I want to plot something... This seems therefore linked to matplotlib and not ipython.. Just that now ipython does not get stuck anymore but provide a message regarding the thread issue. (Not very useful in this context for me unfortunately) See the ipython scipy thread in fact : http://lists.ipython.scipy.org/pipermail/ipython-user/2008-July/005628.html So as far as I can tell this is a matplotlib bug and noone so far encountering this problem has a really good idea why it occurs. Indeed the problem occurs *only* when I launch matplotlib commands (after some time in my ipython session). Really annoying but as mentioned before, I cannot get a set of commands which consistenly break the session, so... Eric Yannick Copin wrote: I would say the pb is actually coming from ipython. I experienced it while using ipython-0.8.1, but I guess it disappeared starting with ipython-0.8.3 (see http://ipython.scipy.org/moin/WhatsNew083: Multithreaded shells (used e.g. by matplotlib interaction) have been improved, reducing the possibility of corner case deadlocks.). I'm now using 0.8.4 and I don't remember I ever had this pb again. - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] polar in a subplot
On Tue, Dec 2, 2008 at 11:27 AM, Nils Wagner [EMAIL PROTECTED]wrote: Thank you very much ! It would be nice to have that information in the docstring Done. The next inquiry is related to xticks. I have added xticks(linspace(0,2*pi,24,endpoint=False)) The difference between consecutive xticks is varying between 14 and 16 degrees. For what reason ? Looks like roundoff error. For instance: linspace(0, 2*pi, 24)[7] * 180. / pi 104. If you format that with '%d', it becomes 104, not 105. Is there an accepted way of doing this rounding in matplotlib that doesn't round in odd cases? Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] polar in a subplot
The next inquiry is related to xticks. I have added xticks(linspace(0,2*pi,24,endpoint=False)) The difference between consecutive xticks is varying between 14 and 16 degrees. The following works around the roundoff for me: xticks(linspace(0, 360, 24, endpoint=False) * pi/180.) Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] polar in a subplot
Ryan May wrote: On Tue, Dec 2, 2008 at 11:27 AM, Nils Wagner [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Thank you very much ! It would be nice to have that information in the docstring Done. Thanks for updating the docstring. I actually saw this as a usability bug and have come up with a patch such that polar() (et al) will *replace* the current axes with a polar plot if it isn't already polar. This is (from the user's perspective) similar to how, for example, a histogram plot would work -- that is, you don't have to tell subplot you're about to plot a histogram. But Ryan's new docstring is not obsolete with respect to my proposed change. Both techniques will work, and in fact subplot(polar=True); polar(...) will be slightly faster since it avoids creating a linear axes which is subsequently thrown away. Any argument against committing my change? The next inquiry is related to xticks. I have added xticks(linspace(0,2*pi,24,endpoint=False)) The difference between consecutive xticks is varying between 14 and 16 degrees. For what reason ? Looks like roundoff error. For instance: linspace(0, 2*pi, 24)[7] * 180. / pi 104. If you format that with '%d', it becomes 104, not 105. Is there an accepted way of doing this rounding in matplotlib that doesn't round in odd cases? The polar theta tick formatter could be changed to call round, I guess. Alternatively, it looks like '%0.0f' also does the right thing. I think that's generally what people would want for polar plots. This change would only affect polar theta ticks, so we don't need to worry about a change in behavior in standard Euclidean plots. Ryan's workaround (to get around this numerically external to matplotlib) is a good suggestion as well, but I think changing the formatter may be less surprising... Cheers, Mike -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] pylab or not... crashes or not
On Tue, Dec 2, 2008 at 12:09 PM, Eric Emsellem [EMAIL PROTECTED] wrote: Really annoying but as mentioned before, I cannot get a set of commands which consistenly break the session, so... Since there does not appear to be an easy diagnosis or fix, you may want to consider switching your backend to the non-threaded tkagg JDH - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] polar in a subplot
Michael Droettboom wrote: Thanks for updating the docstring. I actually saw this as a usability bug and have come up with a patch such that polar() (et al) will *replace* the current axes with a polar plot if it isn't already polar. This is (from the user's perspective) similar to how, for example, a histogram plot would work -- that is, you don't have to tell subplot you're about to plot a histogram. But Ryan's new docstring is not obsolete with respect to my proposed change. Both techniques will work, and in fact subplot(polar=True); polar(...) will be slightly faster since it avoids creating a linear axes which is subsequently thrown away. Any argument against committing my change? None here. I'm +1. The polar theta tick formatter could be changed to call round, I guess. Alternatively, it looks like '%0.0f' also does the right thing. I think that's generally what people would want for polar plots. This change would only affect polar theta ticks, so we don't need to worry about a change in behavior in standard Euclidean plots. Ryan's workaround (to get around this numerically external to matplotlib) is a good suggestion as well, but I think changing the formatter may be less surprising... I like the idea of using %0.0f. If I don't hear any objections, I'll go ahead and make the change. It definitely will make things less confusing for our users. Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] polar in a subplot
I've committed both of these things. The subplot()/polar() change seems tricky, so it may produce some breakage even though the regression tests are passing. Please let me know if you see anything strange after this change. Mike Ryan May wrote: Michael Droettboom wrote: Thanks for updating the docstring. I actually saw this as a usability bug and have come up with a patch such that polar() (et al) will *replace* the current axes with a polar plot if it isn't already polar. This is (from the user's perspective) similar to how, for example, a histogram plot would work -- that is, you don't have to tell subplot you're about to plot a histogram. But Ryan's new docstring is not obsolete with respect to my proposed change. Both techniques will work, and in fact subplot(polar=True); polar(...) will be slightly faster since it avoids creating a linear axes which is subsequently thrown away. Any argument against committing my change? None here. I'm +1. The polar theta tick formatter could be changed to call round, I guess. Alternatively, it looks like '%0.0f' also does the right thing. I think that's generally what people would want for polar plots. This change would only affect polar theta ticks, so we don't need to worry about a change in behavior in standard Euclidean plots. Ryan's workaround (to get around this numerically external to matplotlib) is a good suggestion as well, but I think changing the formatter may be less surprising... I like the idea of using %0.0f. If I don't hear any objections, I'll go ahead and make the change. It definitely will make things less confusing for our users. Ryan -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] different behaviour in Windows and Linux
Thanks for the rapid fix Mike. regards, Gary Michael Droettboom wrote: There is an explicit offset of one pixel on the left when it sets up a clip box in Agg. I don't know why this is there, but it dates back to 0.98.0, and earlier versions did something completely different. I can only guess it was to compensate for an earlier bug in the precise drawing of the axes rectangle. I can't explain why it would have different behavior on Windows vs. Linux, though. I have fixed this in SVN r6465 and am including a patch below (which unfortunately requires a recompile). Cheers, Mike - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Bug saving semilogy plots with a axvline
João et al., Thanks for the bug report. Mike D. has fixed the problem in svn. (I had moved the discussion to matplotlib-devel; I am just reporting back to matplotlib-users so this thread can be closed.) Eric Eric Firing wrote: wafels wrote: Hello, I can confirm and extend this bug report. The axvline also moves to the wrong position on resizing the matplotlib display window (Mac OS X 10.5.5, Python 2.5.1, Matplotlib 0.98.3). Thanks It looks like the transform for the line made by axvline is not getting updated when view limits change. The problem is found in svn, after the changes I made to axvline, as well as in 0.98.3. I can't track it down right now. Eric João Luís Silva-2 wrote: Hi, A vertical line on the x axis of a semilogy plot will be in the correct position, but when saved with the save button of the toolbar it will be placed in an incorrect position, although savefig will do the right thing. Furthermore, zooming will not move the axvline correctly. Matplotlib version: 0.98.3 Example script: - import matplotlib.pyplot as pl import numpy as np x = np.linspace(0.0,1.0,100) pl.semilogy(x,x**2) pl.axvline(x=0.5,ls='--',color='k') pl.show() #pl.savefig(saved_image.png) - image.png was saved using the toolbar, saved_image.png using savefig. Regards, João Silva - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Font sizes for web application
Thank you for your answers and the obvious solution (banging head into wall). Best regards, Jesper 2008/12/1 Jae-Joon Lee [EMAIL PROTECTED]: On Mon, Dec 1, 2008 at 12:56 AM, Jesper Larsen [EMAIL PROTECTED] wrote: Hi Matplotlib users, I have a web application in which I would like to scale the plots down if the users horizontal screen size is less than 800. Currently only the plot is scaled while the fonts are fixed in size (see link below for application). This is of course not a viable solution. I was therefore wondering what the best way to scale fonts consistently with figure size is. A requirement is that the scaling is thread safe (or whatever it is called) in the sense that it should not affect other threads executing matplotlib (since they may have different screen resolutions). Saving the figure with smaller dpi doesn't work? It is not clear how you're scaling down the over all plot (smaller figure size, maybe?), but I guess the easiest way is to have everything same and save it with a smaller dpi. -JJ - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
