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... -- 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
