matplotlib-users Mailing List for matplotlib

On 2013年04月01日 13:45:07 +0000, Benjamin Root said:
> 
> On Fri, Mar 29, 2013 at 7:30 PM, Michael Aye 
> <mic...@uc...> wrote:
> Is there a pylab version of ax.plot_surface?
> I am asking because the following does not work when running an ipython
> notebook in pylab mode:
> #0: #create some data ....
> #1: fig = plt.figure()
>    ax = fig.gca(projection='3d')
> #2: surf = ax.plot_surface( .....) # taking the exact command from the examples.
> 
> I have verified that this code only does NOT work when #1 and #2 are
> executed in different notebook cells. When they are combined in the
> same cell, it works.
> As I prefer the flexibility of being able to run everything anywhere, I
> am asking for pylab versions of plot_surface, as I am mostly running
> things in the pylab mode of the notebook.
> 
> Cheers,
> Michael
> 
> 
> The reason this does not work in separate cells is that a figure object 
> gets closed at the end of a ipython cell. An ax object no longer works 
> when its parent figure is closed. This is not limited to 3d plots. I 
> would be surprised to see ax.plot() work if a non-3d axes object was 
> made in a different cell.
Sure, but isn't that just the reason why it doesn't work the OO-way?
That's exactly why I am asking for a pylab version of plot_surface that 
does NOT require to have a 3d axes object available already.
> 
> Ben Root
> 
> ------------------------------------------------------------------------------
> Own the Future-Intel&reg; Level Up Game Demo Contest 2013
> Rise to greatness in Intel's independent game demo contest.
> Compete for recognition, cash, and the chance to get your game
> on Steam. 5ドルK grand prize plus 10 genre and skill prizes.
> Submit your demo by 6/6/13. http://p.sf.net/sfu/intel_levelupd2d
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Hi All,
rc('text', usetex=False)
plot(arange(1,50))
title(' Boo Whoo')
xlabel('$t\ [m^2s^{-1}]$')
Works OK, except the x label is typeset in a different font than the rest due to the latex 
rc('text', usetex=False)
rc('text.latex',preamble="\usepackage{cmbright}")
plot(arange(1,50))
title(' Boo Whoo')
xlabel('$t\ [m^2s^{-1}]$')
Looks pretty good, though I prefer the default fonts, but it takes a long time for all the rendering. 
Is there a better solution to the first case that makes the fonts look more consistent? 
Thanks, Jody
--
Jody Klymak 
http://web.uvic.ca/~jklymak/

Thanks Benjamin...I put that plt.ylim earlier but at a wrong place. It
worked. Thanks again!
On 1 April 2013 19:01, Benjamin Root <ben...@ou...> wrote:
>
>
> On Mon, Apr 1, 2013 at 7:29 AM, Sayan Chatterjee <
> say...@gm...> wrote:
>
>> Thank you very much!!...'plt.cla()' worked!!
>>
>> One slight hiccup. Could you please tell me how to fix up the Y grid? I
>> mean I want every plot to have scale from 0 to 15 (say), not that some will
>> have -5 to 10 and some will have 5 to 20.Is it possible?...it's
>> absolutely necessary for the concerned simulation.
>>
>> :)
>> Sayan
>>
>>
> put "plt.ylim(0, 15) " before the call to savefig().
>
> Ben Root
>
>
-- 
--------------------------------------------------------------------------
*Sayan Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com
Volunteer , Padakshep
www.padakshep.org

On 29/03/2013 15:49, Mark Lawrence wrote:
> Hi all,
>
> From http://labix.org/python-dateutil
>
> "To generate a rrule for the use case of "a date on the specified day of
> the month, unless it is beyond the end of month, in which case it will
> be the last day of the month" use the following:
>
> rrule(MONTHLY, bymonthday=(some_day, -1), bysetpos=1)
>
> This will generate a value for every calendar month regardless of the
> day of the month it is started from."
>
> Using bymonthday with MonthLocator gives ticks on the day given and the
> last day of the month, which looks extremely ugly. Code below demonstrates.
>
> from dateutil.rrule import *
> import datetime
> import matplotlib.pyplot as plt
> from matplotlib.ticker import FormatStrFormatter, MultipleLocator
> from matplotlib.dates import DateFormatter, MonthLocator, DayLocator
>
> start = datetime.date(2013, 3, 29)
> until = datetime.date(2014, 3, 29)
> dates = rrule(MONTHLY, bymonthday=(29, -1), bysetpos=1, until=until)
> for d in dates:print(d)
>
> dates = [start, until]
> values = [0, 1]
> plt.ylabel('Balance')
> plt.grid()
> ax = plt.subplot(111)
> plt.plot_date(dates, values, fmt = 'rx-')
> ax.xaxis.set_major_locator(MonthLocator(bymonthday = (dates[0].day, -1)))
> ax.xaxis.set_major_formatter(DateFormatter('%d/%m/%y'))
> ax.yaxis.set_major_formatter(FormatStrFormatter('£%0.2f'))
> ax.yaxis.set_minor_locator(MultipleLocator(5))
> plt.axis(xmin=dates[0], xmax=dates[-1])
> plt.setp(plt.gca().get_xticklabels(), rotation = 45, fontsize = 10)
> plt.setp(plt.gca().get_yticklabels(), fontsize = 10)
> plt.show()
>
Seems an apt date to realise that I didn't say much :(
Assuming that I'm correct would you like an issue raised on the bug 
tracker? If not please correct the mistake I've made, presumably in 
reading the docs, which I think are excellent by the way.
-- 
If you're using GoogleCrapTM please read this 
http://wiki.python.org/moin/GoogleGroupsPython.
Mark Lawrence

On Fri, Mar 29, 2013 at 7:30 PM, Michael Aye <mic...@uc...> wrote:
> Is there a pylab version of ax.plot_surface?
> I am asking because the following does not work when running an ipython
> notebook in pylab mode:
> #0: #create some data ....
> #1: fig = plt.figure()
> ax = fig.gca(projection='3d')
> #2: surf = ax.plot_surface( .....) # taking the exact command from the
> examples.
>
> I have verified that this code only does NOT work when #1 and #2 are
> executed in different notebook cells. When they are combined in the
> same cell, it works.
> As I prefer the flexibility of being able to run everything anywhere, I
> am asking for pylab versions of plot_surface, as I am mostly running
> things in the pylab mode of the notebook.
>
> Cheers,
> Michael
>
>
The reason this does not work in separate cells is that a figure object
gets closed at the end of a ipython cell. An ax object no longer works
when its parent figure is closed. This is not limited to 3d plots. I
would be surprised to see ax.plot() work if a non-3d axes object was made
in a different cell.
Ben Root

On Mon, Apr 1, 2013 at 7:29 AM, Sayan Chatterjee
<say...@gm...>wrote:
> Thank you very much!!...'plt.cla()' worked!!
>
> One slight hiccup. Could you please tell me how to fix up the Y grid? I
> mean I want every plot to have scale from 0 to 15 (say), not that some will
> have -5 to 10 and some will have 5 to 20.Is it possible?...it's
> absolutely necessary for the concerned simulation.
>
> :)
> Sayan
>
>
put "plt.ylim(0, 15) " before the call to savefig().
Ben Root

Thank you very much!!...'plt.cla()' worked!!
One slight hiccup. Could you please tell me how to fix up the Y grid? I
mean I want every plot to have scale from 0 to 15 (say), not that some will
have -5 to 10 and some will have 5 to 20.Is it possible?...it's
absolutely necessary for the concerned simulation.
:)
Sayan
On 1 April 2013 07:02, Benjamin Root <ben...@ou...> wrote:
>
>
>
> On Sun, Mar 31, 2013 at 11:51 AM, Sayan Chatterjee <
> say...@gm...> wrote:
>
>> Thank you very much I have been able to plot from the data files, but
>> facing a slight glitch. The data points are being super imposed in
>> consecutive plots.That means if the 1st data file contains 50 points and
>> the second 30. The second plot will contain 80 points! How to go about this
>> problem?
>>
>> for i in range(0,20):
>> fname = 'file_' + str(i) + '.dat'
>> f=open(fname,"r")
>> x,y = np.loadtxt(fname, unpack=True)
>> plt.scatter(x,y)
>> pylab.savefig(fname + '.png')
>> f.close()
>>
>>
> Sayan,
>
> Try putting "plt.cla()" after the call to "pylab.savefig()".
>
> Ben Root
>
-- 
--------------------------------------------------------------------------
*Sayan Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com
Volunteer , Padakshep
www.padakshep.org

On Sun, Mar 31, 2013 at 11:51 AM, Sayan Chatterjee <
say...@gm...> wrote:
> Thank you very much I have been able to plot from the data files, but
> facing a slight glitch. The data points are being super imposed in
> consecutive plots.That means if the 1st data file contains 50 points and
> the second 30. The second plot will contain 80 points! How to go about this
> problem?
>
> for i in range(0,20):
> fname = 'file_' + str(i) + '.dat'
> f=open(fname,"r")
> x,y = np.loadtxt(fname, unpack=True)
> plt.scatter(x,y)
> pylab.savefig(fname + '.png')
> f.close()
>
>
Sayan,
Try putting "plt.cla()" after the call to "pylab.savefig()".
Ben Root