Re: [Matplotlib-users] data grid problem
On Wed, Oct 10, 2012 at 3:55 PM, Benjamin Root ben.r...@ou.edu wrote: On Wed, Oct 10, 2012 at 9:40 AM, rand0m ran...@0x06.net wrote: Hello, I'm new to matplotlib and I hope you can help me out with my question. When drawing for example a Rectangle() I have to specify it like the following: rect = Rectangle((1, 3), 2, 20, facecolor=#aa) Where 2 is the length and 20 is the height. (1,3) is for xy. Imagine a coordination system where x-axis should represent the value 0 to 100. I would like to draw the rectangle from 50 to 60 on x-axis. So I would specify: rect = Rectangle((50, 3), 10, 20, facecolor=#aa) But this does not work as desired because at the xtick 50 the x-axis does not hold the value 50 but 5 because I made xticks 1-100 with step 10. So my x-axis holds the values 1-10. But I need 1-100. If anyone knows what Im missing I d be glad to hear about it :-). thank you I am not quite sure I understand what you mean. Can you attach an image of the plot you made so far? Ben Root I'm not sure if adding a patch autoscales the view, try rect = Rectangle((50, 3), 10, 20, facecolor=#aa) ax.add_patch(rect) ax.set_xlim(0, 100) ax.set_ylim(0, 25) -- Damon McDougall http://www.damon-is-a-geek.com B2.39 Mathematics Institute University of Warwick Coventry West Midlands CV4 7AL United Kingdom -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Pylab import error due to dateutil
On Wed, Oct 10, 2012 at 3:09 PM, Michael Droettboom md...@stsci.edu wrote: I filed an issue for this. We should try to get the fix into 1.2.x https://github.com/matplotlib/matplotlib/issues/1354 Mike On 10/10/2012 09:00 AM, Michael Droettboom wrote: I think this stack overflow question [1] sort of sums up the problem -- setuptools develop is kind of a hack and only really works if the source structure matches the installed structure. That used to be true of matplotlib, but installing different packages based on the Python version breaks that assumption. A suggestion in the Stack Overflow entry is to install symlinks to fix this, and indeed doing this works: cd lib ln -s dateutil_py2 dateutil We can probably automate this in the setupegg.py script, but I don't think I'll have a chance to get to this today. We can't just include the symlink in git, since it should point to the version that corresponds to the user's Python. [1] http://stackoverflow.com/questions/6019042/is-there-a-way-to-add-a-namespace-prefix-setuptools-package-distributions Mike On 10/10/2012 08:50 AM, Michael Droettboom wrote: This is related to using develop mode. I never use that (I use virtualenvs instead), so this doesn't get much testing. This seems to have broken when we started to ship separate versions of dateutil for python2 and python3. setuptools doesn't seem to like the fact that we rename dateutil_py2 to dateutil when installing (since in develop mode it doesn't really install or move anything). That's problematic, of course. I'll have to see if there's another way to handle this. Mike On 10/09/2012 09:36 PM, Gökhan Sever wrote: Hello, With a fresh git clone git://github.com/matplotlib/matplotlib.git sudo python setupegg.py develop Starting ipython --pylab I get this error: .../matplotlib/lib/matplotlib/dates.py in module() 120 import matplotlib.ticker as ticker 121 -- 122 from dateutil.rrule import rrule, MO, TU, WE, TH, FR, SA, SU, YEARLY, \ 123 MONTHLY, WEEKLY, DAILY, HOURLY, MINUTELY, SECONDLY 124 from dateutil.relativedelta import relativedelta ImportError: No module named dateutil.rrule Installing dateutil 1.5 fixes this. mpl install log shows the following: OPTIONAL DATE/TIMEZONE DEPENDENCIES dateutil: matplotlib will provide pytz: matplotlib will provide Will dateutil be shipped with mpl or this line needs to be updated? Thanks. -- Gökhan Gökhan, did you implement the symlink fix? If so, would you mind making a pull request out of it? I was just about to look into doing this, but if you've done it already that'd save us some effort rolling out fixes for 1.2. Cheers. Damon -- Damon McDougall http://www.damon-is-a-geek.com B2.39 Mathematics Institute University of Warwick Coventry West Midlands CV4 7AL United Kingdom -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Format date tick labels
On Wed, Oct 10, 2012 at 5:00 PM, Benjamin Root ben.r...@ou.edu wrote: On Wed, Oct 10, 2012 at 10:55 AM, Mark Lawrence breamore...@yahoo.co.uk wrote: On 10/10/2012 15:41, Mark Lawrence wrote: On 10/10/2012 14:29, Benjamin Root wrote: I know of a few people who have difficulties with matplotlib's datetime handling, but they are usually operating on the scale of milliseconds or less (lightning data), in which case, one is already at the edge of the resolution handled by python's datetime objects. However, we would certainly welcome any sort of examples of how matplotlib fails in handling seconds scale and lower plots. Cheers! Ben Root I'll assume that the milliseconds above is a typo. From http://docs.python.org/library/datetime.html class datetime.timedelta A duration expressing the difference between two date, time, or datetime instances to microsecond resolution. Still, what's a factor of 1000 amongst friends? :) http://www.python.org/dev/peps/pep-0418/ has been implemented in Python 3.3 and talks about clocks with nanosecond resolutions. I've flagged it up here just in case people weren't aware. Ah, you are right, I meant microseconds. With apologies to Spaceballs: Prepare to go to microsecond resolution! No, no, microsecond resolution is too slow Microsecond resolution is too slow? Yes, too slow. We must use nanosecond resolution! Prep-- Prepare Python, for nanosecond resolution! Cheers! Ben Root Am I missing something here? Are seconds just floats internally? A delta of 1e-6 is nothing (pardon the pun). A delta of 1e-9 is the *least* I'd expect. Maybe even 1e-12. Perhaps the python interpreter doesn't do any denormalisinghttp://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x when encountered with deltas very close to zero... -- Damon McDougall http://www.damon-is-a-geek.com B2.39 Mathematics Institute University of Warwick Coventry West Midlands CV4 7AL United Kingdom -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] data grid problem
On Thursday, October 11, 2012, Damon McDougall wrote: On Wed, Oct 10, 2012 at 3:55 PM, Benjamin Root ben.r...@ou.edujavascript:; wrote: On Wed, Oct 10, 2012 at 9:40 AM, rand0m ran...@0x06.net javascript:; wrote: Hello, I'm new to matplotlib and I hope you can help me out with my question. When drawing for example a Rectangle() I have to specify it like the following: rect = Rectangle((1, 3), 2, 20, facecolor=#aa) Where 2 is the length and 20 is the height. (1,3) is for xy. Imagine a coordination system where x-axis should represent the value 0 to 100. I would like to draw the rectangle from 50 to 60 on x-axis. So I would specify: rect = Rectangle((50, 3), 10, 20, facecolor=#aa) But this does not work as desired because at the xtick 50 the x-axis does not hold the value 50 but 5 because I made xticks 1-100 with step 10. So my x-axis holds the values 1-10. But I need 1-100. If anyone knows what Im missing I d be glad to hear about it :-). thank you I am not quite sure I understand what you mean. Can you attach an image of the plot you made so far? Ben Root I'm not sure if adding a patch autoscales the view, try rect = Rectangle((50, 3), 10, 20, facecolor=#aa) ax.add_patch(rect) ax.set_xlim(0, 100) ax.set_ylim(0, 25) We managed to solve it, but apparently it was off-list. Essentially, I showed him how to use a MultipleLocator to control the axis ticks, rather than labeling them manually at a different scale. Ben Root -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] data grid problem
On Thu, Oct 11, 2012 at 1:52 PM, Benjamin Root ben.r...@ou.edu wrote: On Thursday, October 11, 2012, Damon McDougall wrote: On Wed, Oct 10, 2012 at 3:55 PM, Benjamin Root ben.r...@ou.edu wrote: On Wed, Oct 10, 2012 at 9:40 AM, rand0m ran...@0x06.net wrote: Hello, I'm new to matplotlib and I hope you can help me out with my question. When drawing for example a Rectangle() I have to specify it like the following: rect = Rectangle((1, 3), 2, 20, facecolor=#aa) Where 2 is the length and 20 is the height. (1,3) is for xy. Imagine a coordination system where x-axis should represent the value 0 to 100. I would like to draw the rectangle from 50 to 60 on x-axis. So I would specify: rect = Rectangle((50, 3), 10, 20, facecolor=#aa) But this does not work as desired because at the xtick 50 the x-axis does not hold the value 50 but 5 because I made xticks 1-100 with step 10. So my x-axis holds the values 1-10. But I need 1-100. If anyone knows what Im missing I d be glad to hear about it :-). thank you I am not quite sure I understand what you mean. Can you attach an image of the plot you made so far? Ben Root I'm not sure if adding a patch autoscales the view, try rect = Rectangle((50, 3), 10, 20, facecolor=#aa) ax.add_patch(rect) ax.set_xlim(0, 100) ax.set_ylim(0, 25) We managed to solve it, but apparently it was off-list. Essentially, I showed him how to use a MultipleLocator to control the axis ticks, rather than labeling them manually at a different scale. Ben Root I thought that might have been the problem. Cheers for the follow-up Ben. -- Damon McDougall http://www.damon-is-a-geek.com B2.39 Mathematics Institute University of Warwick Coventry West Midlands CV4 7AL United Kingdom -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] dpi
Hello, I'm confused by the dpi property of figures that can be set in matplotlibrc or passed to pyplot.figure(). It seems to me that dpi is really a property of the backend, not the figure, and the only place to specify it ought to be when saving into a bitmap file. For example, when showing a figure on the screen, I really want matplotlib to use the physical dpi of the monitor rather than any default value. When saving the figure in some vector graphics format, I don't see what the meaning of the dpi is at all. Am I missing something? Best, -Nikolaus -- »Time flies like an arrow, fruit flies like a Banana.« PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] dpi
On Thu, Oct 11, 2012 at 4:00 PM, Nikolaus Rath nikol...@rath.org wrote: When saving the figure in some vector graphics format, I don't see what the meaning of the dpi is at all. Sure, I use `dpi=` all the time for vector formats. Purely because when you make calls to `imshow`, you get a rasterised image embedded in a figure with vector text and tickmarks and labels, for example. -- Damon McDougall http://www.damon-is-a-geek.com B2.39 Mathematics Institute University of Warwick Coventry West Midlands CV4 7AL United Kingdom -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Pylab import error due to dateutil
On Thu, Oct 11, 2012 at 3:49 AM, Damon McDougall
damon.mcdoug...@gmail.comwrote:
Gökhan, did you implement the symlink fix? If so, would you mind
making a pull request out of it? I was just about to look into doing
this, but if you've done it already that'd save us some effort rolling
out fixes for 1.2.
Cheers.
Damon
Hi Damon,
I think adding these lines before execfile line in setupegg.py should fix
it:
import os
os.chdir('lib')
if not os.path.isdir('dateutil'):
os.symlink('dateutil_py2', 'dateutil')
os.chdir('..')
Could you give it a test? Do we require a similar symlink for py3?
Thanks.
--
Gökhan
--
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Re: [Matplotlib-users] Pylab import error due to dateutil
On Thursday, October 11, 2012, Gökhan Sever wrote:
On Thu, Oct 11, 2012 at 3:49 AM, Damon McDougall
damon.mcdoug...@gmail.com javascript:_e({}, 'cvml',
'damon.mcdoug...@gmail.com'); wrote:
Gökhan, did you implement the symlink fix? If so, would you mind
making a pull request out of it? I was just about to look into doing
this, but if you've done it already that'd save us some effort rolling
out fixes for 1.2.
Cheers.
Damon
Hi Damon,
I think adding these lines before execfile line in setupegg.py should fix
it:
import os
os.chdir('lib')
if not os.path.isdir('dateutil'):
os.symlink('dateutil_py2', 'dateutil')
os.chdir('..')
Could you give it a test? Do we require a similar symlink for py3?
Thanks.
--
Gökhan
Awesome. I'll give it a go later on. I'm a little concerned using os.chdir.
I think Peter Wuertz/Chris Gohlke had problems with it not being threadsafe
on windows. Does the same apply here?
--
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom
--
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Re: [Matplotlib-users] dpi
Damon McDougall damon.mcdougall-re5jqeeqqe8avxtiumw...@public.gmane.org writes: On Thu, Oct 11, 2012 at 4:00 PM, Nikolaus Rath nikolaus-bth8mxji...@public.gmane.org wrote: When saving the figure in some vector graphics format, I don't see what the meaning of the dpi is at all. Sure, I use `dpi=` all the time for vector formats. Purely because when you make calls to `imshow`, you get a rasterised image embedded in a figure with vector text and tickmarks and labels, for example. matplotlib actually rescales the raw imshow data when saving to a vector format? Why is that? I think it should embed the bitmap with full resolution in the vector file and rely on the consumer of the vector file to scale it to whatever resolution is supported by the display device. Best, -Nikolaus -- »Time flies like an arrow, fruit flies like a Banana.« PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] XKCD style graphs?
Am 05.10.2012 11:13, schrieb Matthias BUSSONNIER: Le 4 oct. 2012 à 23:09, Juergen Hasch a écrit : Here is my take on it as an IPython notebook, based on Damon's code: http://nbviewer.ipython.org/3835181/ I took the engineering approach and filtered the random function instead of doing some fft/ifft magic. Also, X and Y of the functions are affected now, giving them a more natural look in the slopes. Juergen If anyone have time to make some examples and a right side thumbnail I can make it as featured notebook in the front page of nbviewer. You can even make a direct PR agains nbviewer and I would then just have to merge and deploy. To be fair, notebook should also give some explanation of the code, link to this discussion, maybe show one original xkcd graph. Please take your time, and if there is several submission, we'll sort out how to choose the best(s). I automated things a little more, and learned a few things about matplotlib on the way. Here is the result: http://nbviewer.ipython.org/3847459/ With xkcd-style.py here: https://gist.github.com/3874297 -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Pylab import error due to dateutil
I am not sure about that technical detail, but it works fine here on my
Fedora 16 (x86_64) system.
On Thu, Oct 11, 2012 at 11:04 AM, Damon McDougall damon.mcdoug...@gmail.com
wrote:
On Thursday, October 11, 2012, Gökhan Sever wrote:
On Thu, Oct 11, 2012 at 3:49 AM, Damon McDougall
damon.mcdoug...@gmail.com wrote:
Gökhan, did you implement the symlink fix? If so, would you mind
making a pull request out of it? I was just about to look into doing
this, but if you've done it already that'd save us some effort rolling
out fixes for 1.2.
Cheers.
Damon
Hi Damon,
I think adding these lines before execfile line in setupegg.py should fix
it:
import os
os.chdir('lib')
if not os.path.isdir('dateutil'):
os.symlink('dateutil_py2', 'dateutil')
os.chdir('..')
Could you give it a test? Do we require a similar symlink for py3?
Thanks.
--
Gökhan
Awesome. I'll give it a go later on. I'm a little concerned using
os.chdir. I think Peter Wuertz/Chris Gohlke had problems with it not being
threadsafe on windows. Does the same apply here?
--
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom
--
Gökhan
--
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Deploy New Relic app performance management and know exactly
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Re: [Matplotlib-users] Pylab import error due to dateutil
On Thu, Oct 11, 2012 at 9:25 PM, Gökhan Sever gokhanse...@gmail.com wrote:
I am not sure about that technical detail, but it works fine here on my
Fedora 16 (x86_64) system.
On Thu, Oct 11, 2012 at 11:04 AM, Damon McDougall
damon.mcdoug...@gmail.com wrote:
On Thursday, October 11, 2012, Gökhan Sever wrote:
On Thu, Oct 11, 2012 at 3:49 AM, Damon McDougall
damon.mcdoug...@gmail.com wrote:
Gökhan, did you implement the symlink fix? If so, would you mind
making a pull request out of it? I was just about to look into doing
this, but if you've done it already that'd save us some effort rolling
out fixes for 1.2.
Cheers.
Damon
Hi Damon,
I think adding these lines before execfile line in setupegg.py should fix
it:
import os
os.chdir('lib')
if not os.path.isdir('dateutil'):
os.symlink('dateutil_py2', 'dateutil')
os.chdir('..')
Could you give it a test? Do we require a similar symlink for py3?
Thanks.
--
Gökhan
Awesome. I'll give it a go later on. I'm a little concerned using
os.chdir. I think Peter Wuertz/Chris Gohlke had problems with it not being
threadsafe on windows. Does the same apply here?
I'm not sure how to test this. I'm running `setupegg.py develop` from
within a python virtual env, but somehow it's picking up dateutil
version 1.5. I don't get the `matplotlib will provide` message... Hmm.
--
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom
--
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
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Re: [Matplotlib-users] Format date tick labels
On 11/10/2012 10:55, Damon McDougall wrote: On Wed, Oct 10, 2012 at 5:00 PM, Benjamin Root ben.r...@ou.edu wrote: On Wed, Oct 10, 2012 at 10:55 AM, Mark Lawrence breamore...@yahoo.co.uk wrote: On 10/10/2012 15:41, Mark Lawrence wrote: On 10/10/2012 14:29, Benjamin Root wrote: I know of a few people who have difficulties with matplotlib's datetime handling, but they are usually operating on the scale of milliseconds or less (lightning data), in which case, one is already at the edge of the resolution handled by python's datetime objects. However, we would certainly welcome any sort of examples of how matplotlib fails in handling seconds scale and lower plots. Cheers! Ben Root I'll assume that the milliseconds above is a typo. From http://docs.python.org/library/datetime.html class datetime.timedelta A duration expressing the difference between two date, time, or datetime instances to microsecond resolution. Still, what's a factor of 1000 amongst friends? :) http://www.python.org/dev/peps/pep-0418/ has been implemented in Python 3.3 and talks about clocks with nanosecond resolutions. I've flagged it up here just in case people weren't aware. Ah, you are right, I meant microseconds. With apologies to Spaceballs: Prepare to go to microsecond resolution! No, no, microsecond resolution is too slow Microsecond resolution is too slow? Yes, too slow. We must use nanosecond resolution! Prep-- Prepare Python, for nanosecond resolution! Cheers! Ben Root Am I missing something here? Are seconds just floats internally? A delta of 1e-6 is nothing (pardon the pun). A delta of 1e-9 is the *least* I'd expect. Maybe even 1e-12. Perhaps the python interpreter doesn't do any denormalisinghttp://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x when encountered with deltas very close to zero... What percentage of computer users wants a delta of 1e-12? I suspect that the vast majority of users couldn't care two hoots about miniscule time deltas in a world where changing time zones can cause chaos. Where some applications cannot handle years before 1970, or 1904, or 1900 or whatever. Or they can't go too far forward, 2036 I think but don't quote me. Where people like myself had to put a huge amount of effort into changing code so that applications would carry on working when the date flipped over from 31st December 1999 to 1st January 2000. If things were that simple why is matplotlib using third party modules like dateutil and pytz? Why doesn't the batteries included Python already provide this functionality? -- Cheers. Mark Lawrence. -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Format date tick labels
On Thu, Oct 11, 2012 at 4:53 PM, Mark Lawrence breamore...@yahoo.co.ukwrote: On 11/10/2012 10:55, Damon McDougall wrote: On Wed, Oct 10, 2012 at 5:00 PM, Benjamin Root ben.r...@ou.edu wrote: On Wed, Oct 10, 2012 at 10:55 AM, Mark Lawrence breamore...@yahoo.co.uk wrote: On 10/10/2012 15:41, Mark Lawrence wrote: On 10/10/2012 14:29, Benjamin Root wrote: I know of a few people who have difficulties with matplotlib's datetime handling, but they are usually operating on the scale of milliseconds or less (lightning data), in which case, one is already at the edge of the resolution handled by python's datetime objects. However, we would certainly welcome any sort of examples of how matplotlib fails in handling seconds scale and lower plots. Cheers! Ben Root I'll assume that the milliseconds above is a typo. From http://docs.python.org/library/datetime.html class datetime.timedelta A duration expressing the difference between two date, time, or datetime instances to microsecond resolution. Still, what's a factor of 1000 amongst friends? :) http://www.python.org/dev/peps/pep-0418/ has been implemented in Python 3.3 and talks about clocks with nanosecond resolutions. I've flagged it up here just in case people weren't aware. Ah, you are right, I meant microseconds. With apologies to Spaceballs: Prepare to go to microsecond resolution! No, no, microsecond resolution is too slow Microsecond resolution is too slow? Yes, too slow. We must use nanosecond resolution! Prep-- Prepare Python, for nanosecond resolution! Cheers! Ben Root Am I missing something here? Are seconds just floats internally? A delta of 1e-6 is nothing (pardon the pun). A delta of 1e-9 is the *least* I'd expect. Maybe even 1e-12. Perhaps the python interpreter doesn't do any denormalising http://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x when encountered with deltas very close to zero... What percentage of computer users wants a delta of 1e-12? I suspect that the vast majority of users couldn't care two hoots about miniscule time deltas in a world where changing time zones can cause chaos. Where some applications cannot handle years before 1970, or 1904, or 1900 or whatever. Or they can't go too far forward, 2036 I think but don't quote me. Where people like myself had to put a huge amount of effort into changing code so that applications would carry on working when the date flipped over from 31st December 1999 to 1st January 2000. If things were that simple why is matplotlib using third party modules like dateutil and pytz? Why doesn't the batteries included Python already provide this functionality? Preach on, my brother! Preach on! [psst -- you are facing the choir...] Cheers! Ben Root -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Pylab import error due to dateutil
Thanks for taking this on, Damon and Gökhan.
Note this will need to create a different symlink (to dateutil_py3
instead) on Python 3. This means, of course, that it will be impossible
to develop on both Python 2 and 3 simultaneously, but that's true of
setuptools' develop in any event, so it's no great loss.
Mike
On 10/11/2012 03:38 PM, Damon McDougall wrote:
On Thu, Oct 11, 2012 at 9:25 PM, Gökhan Sever gokhanse...@gmail.com wrote:
I am not sure about that technical detail, but it works fine here on my
Fedora 16 (x86_64) system.
On Thu, Oct 11, 2012 at 11:04 AM, Damon McDougall
damon.mcdoug...@gmail.com wrote:
On Thursday, October 11, 2012, Gökhan Sever wrote:
On Thu, Oct 11, 2012 at 3:49 AM, Damon McDougall
damon.mcdoug...@gmail.com wrote:
Gökhan, did you implement the symlink fix? If so, would you mind
making a pull request out of it? I was just about to look into doing
this, but if you've done it already that'd save us some effort rolling
out fixes for 1.2.
Cheers.
Damon
Hi Damon,
I think adding these lines before execfile line in setupegg.py should fix
it:
import os
os.chdir('lib')
if not os.path.isdir('dateutil'):
os.symlink('dateutil_py2', 'dateutil')
os.chdir('..')
Could you give it a test? Do we require a similar symlink for py3?
Thanks.
--
Gökhan
Awesome. I'll give it a go later on. I'm a little concerned using
os.chdir. I think Peter Wuertz/Chris Gohlke had problems with it not being
threadsafe on windows. Does the same apply here?
I'm not sure how to test this. I'm running `setupegg.py develop` from
within a python virtual env, but somehow it's picking up dateutil
version 1.5. I don't get the `matplotlib will provide` message... Hmm.
--
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Re: [Matplotlib-users] dpi
On Fri, Oct 12, 2012 at 3:39 AM, Nikolaus Rath nikol...@rath.org wrote: matplotlib actually rescales the raw imshow data when saving to a vector format? Why is that? I think it should embed the bitmap with full resolution in the vector file and rely on the consumer of the vector file to scale it to whatever resolution is supported by the display device. imshow supports interpolation and that's why rasterization comes in. If you turn off interpolation (w/ interpolation=none), the original image will be embedded. Of course dpi has no meaning in this case. However, I agree with you that dpi should be a property of the backend only, not the figure. But I am not sure if this can be fixed soon. It will be difficult and will take lots of effort I think. -JJ -- 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] trouble switching off smoothing in imshow()
On 2012/10/10 3:07 AM, Anand Sivaramakrishnan wrote: Thanks for the many useful responses - I eventuallyfound by experiment that imshow( interpolation='nearest' works *if* I write a png file. Saving a pdf file mushed up my crisp pixel boundaries. However, saving as png, then using (mac osx) preview to convert to pdf worked fine. Go figure()! This doesn't seem right to me, that pdf would be mushed. Would you supply an example, please? Ideally a simple script with the png result and the mpl pdf result? Eric I have solved this problem earlier using figimage(), but that was a lot of work (I had to create a pixel-by-pixel array with all greyscale values set myself, and then I was working in pixel coordinates rather than my data coordinates). Has anyone figured out how to get imshow to stop smoothing the image? Using imshow(… interpolation='none'…) or imshow(… interpolation=None…) raise exceptions. I found NonUniformImage too hard to figure out from the documentation. -- 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 Matplotlib-users@lists.sourceforge.net mailto:Matplotlib-users@lists.sourceforge.net 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 Matplotlib-users@lists.sourceforge.net 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 Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
