William Stein wrote: > On Wed, Apr 15, 2009 at 10:56 AM, William Stein <wst...@gmail.com> wrote: > >> On Wed, Apr 15, 2009 at 10:37 AM, Jose Guzman <n...@neurohost.org> wrote: >> >>> William Stein wrote: >>> >>>> 2009/4/15 William Stein <wst...@gmail.com>: >>>> >>>> >>>>> 2009/4/15 Jose Guzman <n...@neurohost.org>: >>>>> >>>>> >>>>>> Hi there >>>>>> >>>>>> I am trying to teach some simple principles of single compartment models >>>>>> with sage and I plotted a couple of exponential equations in my notebook. >>>>>> >>>>>> Although I got a nice x-axis () and other labels and similar things, I >>>>>> cannot find a way to plot the y-axis in the vertical axis. Is there >>>>>> anyway to do it? >>>>>> >>>>>> You can take a look to my notebook to see what I mean >>>>>> http://sagenb.org/home/pub/457 >>>>>> >>>>>> Another additional problem is that the LaTeX fonts are pretty small, and >>>>>> I cannot represent Greek letters (like alpha, tau, pi,etc..) in the >>>>>> labels (see the syntax bellow). >>>>>> >>>>>> xlabel = text('Time (Units of $\tau$)',(3,-.10), rgbcolor='black') >>>>>> >>>>>> This \tau does not show up in the graphic, but strange enough, this >>>>>> works out of the box (pretty small though) >>>>>> >>>>>> lnlabel = text('Unrecoverable fraction ($f_{U} = 1 - >>>>>> f_{S}$)',(4,FS+.05),rgbcolor='black') >>>>>> >>>>>> thank you very much in advance for your help and care! >>>>>> >>>>>> >>>>> Just one remar. There is a fontsize option to text: >>>>> >>>>> >>>>> xlabel = text('Time (Units of $\tau$)',(3,-.10), rgbcolor='black', >>>>> fontsize=30) >>>>> >>>>> William >>>>> >>>>> >>>> The second remark is that backslash is an escape character for strings in >>>> (almost) all programming languages. You have to do \\ to get a single >>>> backslash, so this works: >>>> >>>> xlabel = text('Time (Units of $\\tau$)',(3,-.10), rgbcolor='black', >>>> fontsize=30) >>>> >>>> Or you can do: >>>> >>>> xlabel = text(r'Time (Units of $\tau$)',(3,-.10), rgbcolor='black', >>>> fontsize=30) >>>> >>>> >>>> >>> Thank you very much for your remarks, everything worked fine, except for >>> that I did not manage to create a vertical oriented y-axis label. >>> >> That might not be implemented yet in Sage directly. >> >> >>> I >>> think the solution would be to import the matplotlib python module and >>> use it under Sage, however I did not find a proper manual to follow. >>> >> Here is how to use matplotlib directly in the Sage notebook: >> >> import pylab as p >> p.figure() >> t = p.arange(0.01, 2.0, 0.01) >> s = p.sin(2 * p.pi * t) >> s = p.array([float(f(x)) for x in t]) >> P = p.plot(t, s, linewidth=4) >> p.xlabel('time (s)'); p.ylabel('voltage (mV)') >> p.title('Matlab-style plotting in Sage') >> p.grid(True) >> p.savefig('sage.png') >> >> > > The above example depends on a function f being defined, e.g., > > x = var('x') > f(x) = sin(3*x)*x+log(x) + 1/(x+1)^2 > > > > Thank you very much for your nice example. Actually I became confused with all the backend stuff, but this example I realize how to use matplotlib under Sage, although I have to admit I love the plotting capabilities of Sage. Is there any way I can have a look to the code so that I might try to implement some new characteristisc (like y-axis, fontsize of the axis, etc...)
Thank you very very much! Jose. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
