matplotlib-users Mailing List for matplotlib

I have a general performance question - is matplotlib expected to deal well with 
  large plots when you are zoomed into a small region?  That is, if I have 100K 
points in a graph but have set my limits so that only 100 of them are visible at 
one time, should that be comparable to creating a plot with only the visible 
items and re-creating it each time the limits are moved?  (Assuming the X axis 
is monotonic and I do the obvious type of filtering in Python.)  It seems to be 
a bit sluggish...

Thanks,

	Wayne

> Alan G Isaac wrote:
>> It would be great to be able to, e.g.,
>> matlab.plot(d,f(d),'(1,1,0)-')
>> or
>> matlab.plot(d,f(d),'#eeefff-')

On Tue, 21 Sep 2004, Gary apparently wrote:
> I second the request.
> But I have an idea.  Try this:
> matlab.plot(d, f(d), color = (1,0,0))


In retrospect it is obvious.
Better yet, you can
matlab.plot(d, f(d), '--', color = (1,0,0))
etc.

Excellent!

Thank you!
Alan Isaac

                Hello,

I would like to know if it's possible to have only the figure save in 
postscript. An eps file in some sort with not white above or at the 
bottom of the page?

Thanks,

    Nicolas

On Tue, 21 Sep 2004, Gary apparently wrote:
> import matplotlib.colors
> help(matplotlib.colors)

Yes, I've been using this to set arbitrary
colors everywhere except in the plot command.
Maybe I'm missing something obvious, but the
3rd argument to a plot command must be a string,
and despite the apparent suggest in the docs,
hex strings are not supported. 

That is, I cannot find a way to do this.

It would be great to be able to, e.g.,
matlab.plot(d,f(d),'(1,1,0)-')
or
matlab.plot(d,f(d),'#eeefff-')

Am I missing an obvious way to do this?

fwiw,
Alan

A quick google search reveals that someone has already published a
tutorial for animating graphs made with matplotlib using mencoder...
Check it out:
http://web.media.mit.edu/~lifton/code/GraphMovies/

He even provides an example script...

Synchronicity...

Cheers,

Flavio



On Mon, 2004-09-20 at 20:50, John Hunter wrote:

> >>>>> "Peter" == Peter Groszkowski <pgr...@ge...> writes:
> 
>     Peter> use mplayer to put the png images together.. results are
>     Peter> quite nice...
> 
> Can you post the command you use to play the pngs?  Can mplayer output
> an avi or mpg, or does it just animate the images.
> 
> I saw from the man pages that something like
> 
>  mplayer mf=type=png:fps=25 mf:/filemask
> 
> is required, but I don't know how to set the filemask of if this is
> the right approach.  I'd like to add some instructions to the FAQ.
> 
> Thanks,
> JDH
> 
> 
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matplotlib.matlab allows control of axis (border) display with
axis('off')
Is finer control offered?  
If not, please consider the following an enhancement
request.

I like the behavior of gnuplot,
where borders are encoded in a 12-bit integer.
The bottom four bits control the border for a 2D plot.
            Bit   include plot axis/border:
              1   bottom 
              2   left  
              4   top  
              8   right

I find it possible to mimic this using the new
axhline and axvline to a certain extent (but, 
e.g., no tics). However a axvline placed at
ymin tends not to display on screen unless linewidth is
increased.

fwiw,
Alan Isaac

Two questions and a comment:

Q1. For 'figure' I'm not seeing any effect
of edgecolor (on screen).  Isn't this the
color of the border between the face (or
frame) and the figure (as determined by axes)?

Q2. Can line colors be set to arbitrary rgb colors using
matlab.plot?  If so, what is the syntax?
If not, can this be a feature request?

Minor comment:
is the 'y' yellow needed for a Matlab match?
If not, it needs adjustment IMHO.

fwiw,
Alan Isaac

On Thu, 09 Sep 2004, John Hunter apparently wrote:
>     # set the locations of the xticks
>     xticks( arange(6) )

>     # set the locations and labels of the xticks
>     xticks( arange(5), ('Tom', 'Dick', 'Harry', 'Sally', 'Sue') )

Just for context, there is much I can do with Matplotlib
that I cannot do in gnuplot, and vice versa.  Naturally I
want the best of both worlds ...

In gnuplot, I can
set xtics axis 
to put the tics (both the tics themselves and the
accompanying labels) along the zeroaxis (If the zeroaxis is
very close to the border, the axis option will move the tic
labels to outside the border.)

Now that you have given us axhline as a generalization of
gnuplot's
set xzeroaxis
please consider letting xticks take an optional "loc"
argument, which could either be "border" or a number to be
interpreted as a 'y' value.

So, e.g.,
axhline()
xticks(arange(5),loc=0)
would draw an xzeroaxis and
put the xtics along it.

Am I overlooking an obvious way to do this (in the
matlab module)?

fwiw,
Alan