Re: [Matplotlib-users] dashes and dpi?

2008-02-02 Thread Wayne E. Harlan 


Mark Bakker wrote:
> Yet here you claim that 1pt = 1/72 inch.
> Is that always the case?
Kind of.  This is a typesetting measurement originally having nothing to 
do with computers, displays or graphics files.  However at Wikipedia 
they say its definition has changed over time.
http://en.wikipedia.org/wiki/Point_%28typography%29


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[Matplotlib-users] Can I change placement of X-Axis?

2008-02-02 Thread volcs0 

I saw one post related to arbitrary axis positioning from 2005, but there was
no solution.

I'd like to generate a plot similar to this:

http://www.nabble.com/file/p15246318/250027952-L.png 

Is there a way to move the X-axis to Y=0 - and remove the bounding box?

Thanks.

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Re: [Matplotlib-users] Can I change placement of X-Axis?

2008-02-02 Thread Eric Firing 
volcs0 wrote:
> I saw one post related to arbitrary axis positioning from 2005, but there was
> no solution.

It is still on the wish list.

Eric

> 
> I'd like to generate a plot similar to this:
> 
> http://www.nabble.com/file/p15246318/250027952-L.png 
> 
> Is there a way to move the X-axis to Y=0 - and remove the bounding box?
> 
> Thanks.
> 


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Re: [Matplotlib-users] Can I change placement of X-Axis?

2008-02-02 Thread John Hunter 
On Feb 2, 2008 3:06 PM, Eric Firing <[EMAIL PROTECTED]> wrote:
> volcs0 wrote:
> > I saw one post related to arbitrary axis positioning from 2005, but there 
> > was
> > no solution.
>
> It is still on the wish list.

Though with a little hacking, you can emulate it by manually drawing
everything yourself -- this is the approach SAGE takes.  Eg,

import numpy as np
from pylab import figure, show
import matplotlib.lines as lines

def make_xaxis(ax, yloc, offset=0.05, **props):
xmin, xmax = ax.get_xlim()
locs = [loc for loc in ax.xaxis.get_majorticklocs()
if loc>=xmin and loc<=xmax]
tickline, = ax.plot(locs, [yloc]*len(locs),linestyle='',
marker=lines.TICKDOWN, **props)
axline, = ax.plot([xmin, xmax], [yloc, yloc], **props)
tickline.set_clip_on(False)
axline.set_clip_on(False)
for loc in locs:
ax.text(loc, yloc-offset, '%1.1f'%loc,
horizontalalignment='center',
verticalalignment='top')

def make_yaxis(ax, xloc=0, offset=0.05, **props):
ymin, ymax = ax.get_ylim()
locs = [loc for loc in ax.yaxis.get_majorticklocs()
if loc>=ymin and loc<=ymax]
tickline, = ax.plot([xloc]*len(locs), locs, linestyle='',
marker=lines.TICKLEFT, **props)
axline, = ax.plot([xloc, xloc], [ymin, ymax], **props)
tickline.set_clip_on(False)
axline.set_clip_on(False)

for loc in locs:
ax.text(xloc-offset, loc, '%1.1f'%loc,
verticalalignment='center',
horizontalalignment='right')


props = dict(color='black', linewidth=2, markeredgewidth=2)
x = np.arange(200.)
y = np.sin(2*np.pi*x/200.) + np.random.rand(200)-0.5
fig = figure(facecolor='white')
ax = fig.add_subplot(111, frame_on=False)
ax.axison = False
ax.plot(x, y, 'd', markersize=8, markerfacecolor='blue')
ax.set_xlim(0, 200)
ax.set_ylim(-1.5, 1.5)
make_xaxis(ax, 0, offset=0.1, **props)
make_yaxis(ax, 0, offset=5, **props)
fig.savefig('manual_axis.png', dpi=100, facecolor='white', edgecolor='white')
show()


test.py
Description: Binary data
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Re: [Matplotlib-users] Can I change placement of X-Axis?

2008-02-02 Thread volcs0 

Perfect. Thank you.

I saw a reference to this hack in the 2005 post, but the linked forum post
was inaccessible to me (as a non-developer).

Thanks again.



John Hunter-4 wrote:
> 
> On Feb 2, 2008 3:06 PM, Eric Firing <[EMAIL PROTECTED]> wrote:
>> volcs0 wrote:
>> > I saw one post related to arbitrary axis positioning from 2005, but
>> there was
>> > no solution.
>>
>> It is still on the wish list.
> 
> Though with a little hacking, you can emulate it by manually drawing
> everything yourself -- this is the approach SAGE takes.  Eg,
> 
> import numpy as np
> from pylab import figure, show
> import matplotlib.lines as lines
> 
> def make_xaxis(ax, yloc, offset=0.05, **props):
> xmin, xmax = ax.get_xlim()
> locs = [loc for loc in ax.xaxis.get_majorticklocs()
> if loc>=xmin and loc<=xmax]
> tickline, = ax.plot(locs, [yloc]*len(locs),linestyle='',
> marker=lines.TICKDOWN, **props)
> axline, = ax.plot([xmin, xmax], [yloc, yloc], **props)
> tickline.set_clip_on(False)
> axline.set_clip_on(False)
> for loc in locs:
> ax.text(loc, yloc-offset, '%1.1f'%loc,
> horizontalalignment='center',
> verticalalignment='top')
> 
> def make_yaxis(ax, xloc=0, offset=0.05, **props):
> ymin, ymax = ax.get_ylim()
> locs = [loc for loc in ax.yaxis.get_majorticklocs()
> if loc>=ymin and loc<=ymax]
> tickline, = ax.plot([xloc]*len(locs), locs, linestyle='',
> marker=lines.TICKLEFT, **props)
> axline, = ax.plot([xloc, xloc], [ymin, ymax], **props)
> tickline.set_clip_on(False)
> axline.set_clip_on(False)
> 
> for loc in locs:
> ax.text(xloc-offset, loc, '%1.1f'%loc,
> verticalalignment='center',
> horizontalalignment='right')
> 
> 
> props = dict(color='black', linewidth=2, markeredgewidth=2)
> x = np.arange(200.)
> y = np.sin(2*np.pi*x/200.) + np.random.rand(200)-0.5
> fig = figure(facecolor='white')
> ax = fig.add_subplot(111, frame_on=False)
> ax.axison = False
> ax.plot(x, y, 'd', markersize=8, markerfacecolor='blue')
> ax.set_xlim(0, 200)
> ax.set_ylim(-1.5, 1.5)
> make_xaxis(ax, 0, offset=0.1, **props)
> make_yaxis(ax, 0, offset=5, **props)
> fig.savefig('manual_axis.png', dpi=100, facecolor='white',
> edgecolor='white')
> show()
> 
>  
>  
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