matplotlib-users Mailing List for matplotlib

I am putting the finishing touches on the new formatter, but I need to figure 
out how to do a regular expression that will match each of these strings:

r'$10$'
r'$+7.3567{\times}10$'
r'$-5.740977777{\times}10$'
r'${\times}10$'

Here is my attempt:

re.compile('\$([(\{\\times\}?)\-+0-9]+)\^\{(-?[0-9]+)\}\$')

Could an Regular Expression Guru please have mercy on me? My head is killing 
me.

-- 
Darren S. Dale

Bard Hall
Department of Materials Science and Engineering
Cornell University
Ithaca, NY. 14850

dd...@co...

>>>>> "Svein-Erik" == Svein-Erik Hamran <se...@ff...> writes:

    Svein-Erik> Matt, Thank you for the reply.

    Svein-Erik> I added in the self.Refresh() command. Then the window
    Svein-Erik> turns white when the programs comes to that point. I
    Svein-Erik> also tried to add a time.sleep(0.1) inside the for
    Svein-Erik> loop so that the GUI could respond to other events,
    Svein-Erik> but it had no effect.

    Svein-Erik> Any other ideas?

It would be most helpful if you provided a standalone example which we
can run and replicate your problem.

JDH

>>>>> "Vidar" == Vidar Gundersen <vid...@37...> writes:

    Vidar> is the script that were used to create figure 2.15 in the
    Vidar> matplotlib Users Guide 0.80 (.pdf) available as source
    Vidar> code?

This example was provided by Bogdan Marinescu in a wx app

  http://sourceforge.net/mailarchive/message.php?msg_id=9031059

Here is a simplified, pylab version

    from pylab import subplot, sin, pi, arange, set, show
    ax = subplot(111)
    t = arange(0.0,3.0,0.01)
    s = sin(2*pi*t)
    c = sin(4*pi*t)

    p = ax.fill(t,s,'b',t,c,'g')
    set(p, alpha=0.2)
    ax.vlines( [1.5], -1.0, 1.0 )
    show()


Amazing so few lines produce such a cool looking figure, no?

JDH

>>>>> "Darren" == Darren Dale <dd...@co...> writes:

    Darren> Hi Everyone, The x axis can draw ticks on the top and/or
    Darren> the bottom of the window. The default is both, with
    Darren> ticklabels on the bottom. xaxis.tick_top will cause ticks
    Darren> and labels to draw only on the top, tick_bottom will do
    Darren> the same on the bottom. But if I make such a change, there
    Darren> is no xaxis method to draw ticks (and maybe labels) on
    Darren> both the top and the bottom, if I want to undo the
    Darren> changes.

If noone responds with a -1 on these changes, go ahead and make them.
Be sure and update the API_CHANGES document and make sure that
examples/shared_axis_demo.py still works (you may need to look at
pylab.twinx to insure that it is consistent with your changes).

JDH

>>>>> "Michael" == Michael J Rehberg <mic...@fi...> writes:

    Michael> x_value = [thisrow[0] for thisrow in sql_result_set]
    Michael> y_value = [thisrow[1] for thisrow in sql_result_set]

You can do this in one pass with
 
  x_value, y_value = zip(*sql_result_set)

JDH

On Wednesday 04 May 2005 12:54 pm, Michael J. Rehberg wrote:
> Hello list,
>
> So far I'm pleased with matplotlib and python.  I'm a pretty new user and
> find the coding very rapid and the ability to glue different database and
> statistical programs together pretty slick.  I have a question.
>
> I am retrieving data from a database using an ODBC connection.  When I
> print the result set, "sql_result_set", looks like this, a list of tuples
> (I think?):
>
>     [(31773, 60.691), (31772, 61.991), ...and so on... (31774, 60.779)]
>
> Each tuple contains the X value and Y value for each coordinate on the line
> plot I wish to make.
>
> After experimentation, I found that I could extract 2 vectors, one for x
> and one for y, by doing this:
>
>     x_value = [thisrow[0] for thisrow in sql_result_set]
>     y_value = [thisrow[1] for thisrow in sql_result_set]
>
> and then fed the result into plot
>
>     plot(x_value, y_value)
>
> Now this works, but seems an inefficient way to do this.
>
> Is there a way to force the plot(x,y) command to recognize my
> "sql_result_set" as a list of x,y tuples, instead of splitting the set into
> two vectors?  This would seem a natural way for plot to operate.  Somehow I
> think the "apply" notation, "*" or "**", might do this, but I'm stuck.
>
> Thanks for your ideas.  Please let me know if I missed the obvious.

Hi Michael,

You can use a LineCollection for this. Check out line_collections.py in the 
examples directory (in CVS, not included with mpl-0.80).

Darren

-- 
Darren S. Dale

Bard Hall
Department of Materials Science and Engineering
Cornell University
Ithaca, NY. 14850

dd...@co...

Hello list,

So far I'm pleased with matplotlib and python.  I'm a pretty new user and
find the coding very rapid and the ability to glue different database and
statistical programs together pretty slick.  I have a question.

I am retrieving data from a database using an ODBC connection.  When I print
the result set, "sql_result_set", looks like this, a list of tuples (I
think?):

    [(31773, 60.691), (31772, 61.991), ...and so on... (31774, 60.779)]

Each tuple contains the X value and Y value for each coordinate on the line
plot I wish to make.

After experimentation, I found that I could extract 2 vectors, one for x and
one for y, by doing this:

    x_value = [thisrow[0] for thisrow in sql_result_set]
    y_value = [thisrow[1] for thisrow in sql_result_set]

and then fed the result into plot

    plot(x_value, y_value)

Now this works, but seems an inefficient way to do this.

Is there a way to force the plot(x,y) command to recognize my
"sql_result_set" as a list of x,y tuples, instead of splitting the set into
two vectors?  This would seem a natural way for plot to operate.  Somehow I
think the "apply" notation, "*" or "**", might do this, but I'm stuck.

Thanks for your ideas.  Please let me know if I missed the obvious.

Mike Rehberg

Matt,

Thank you for the reply.

I added in the self.Refresh() command. Then the window turns white when the programs comes to that point. I also tried to add a time.sleep(0.1) inside the for loop so that the GUI could respond to other events, but it had no effect.

Any other ideas? 

Svein-Erik

> From: Matt Newville [new...@ca...]
> Sent: 2005-05-03 21:52:39 CEST
> To: Svein-Erik Hamran [se...@ff...]
> Cc: mat...@li...
> Subject: Re: [Matplotlib-users] dynamic plot problem
> 
> Svein-Erik,
> 
> I can't run your example because I don't have pyFDTF06:
> > from pyFDTD06 import *
> 
> But it seems you have a classic case of putting a resource
> intensive loop inside a GUI (in this case, in the OnStart
> method) and not allowing the GUI toolkit to respond to 
> other events.
> 
> As a first attempt to fix this, you probably want to add a
> self.Refresh() in your loop in OnStart:
> 
> #         if ( (self.el.iteration % self.el.PLOT_MODULUS) == 0):
> #             self.im.set_array(self.el.Ex[:,:,22])
> #             self.canvas.draw()
> #             self.Refresh()         # <--- !!
> #         self.el.pointsource(45,20,22)
> 
> 
> A better approach might be to replace your
>    for self.el.iteration in range(0, self.el.TIME_STEPS)
> 
> loop with a timer loop.
> 
> Hope that helps, 
> 
> --Matt
> 
> 

I tried out the new tick formatter, which is very nice.  That said, the 
new formatter doesn't work if one is using numarray 1.2.3 as numerix.  
The bug is in numarraycore.py, where all instances of add.reduce have to 
change to ufunc.add.reduce;  this was fixed in numarray 1.3.1.

Just hoping to save some others a bit of work;  I'm sure many of you are 
not as compulsive as I am about doing upgrades ;-)

Hi John,

Attached is an updated dates.py (base is matplotlib 0.8) and two demo 
files which I changed a bit to test this date stuff (default to French 
locale etc).

Please note that both demo files by default use wxAgg backend, if I use 
the TkAgg I get the following error:

_tkinter.TclError: bad screen distance "640.0"

Maybe it has to do with the fact that the figure is actually by default 
a bit too small to hold the plot for date_demo_rrule2.

There is one case I changed, but could not test as I did not find a 
sample and haven't had time to figure it out myself how to use it.  It 
is the "IndexDateFormatter", if anyone has a sample using this I would 
appreciate if he/she could post it here.

Best regards
Werner

John Hunter wrote:
>>>>>>"Florent" == Florent Rougon <f.r...@fr...> writes:
> 
> 
> 
>     Florent> There are several other uses of strftime. Maybe some of
>     Florent> them should be changed, also...
> 
> Werner, could I trouble you to do this -- update all the uses of
> strftime to properly handle locales and send me a patch?
> 
> Thanks,
> JDH
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by: NEC IT Guy Games.
> Get your fingers limbered up and give it your best shot. 4 great events, 4
> opportunities to win big! Highest score wins.NEC IT Guy Games. Play to
> win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20

is the script that were used to create figure 2.15
in the matplotlib Users Guide 0.80 (.pdf) available
as source code?