matplotlib-users

[Matplotlib-users] Lines and columns in legends

[José A. N. <na...@te...>]

Hello,

Is there an easy way to make a legend with multiple lines
and columns? I need 8 plots in the same figure, and the
legend takes a lot of space. I believe that if I could
orient the legend in multiple lines and columns (say, 2
lines with four columns each), I could save a lot of
space, giving more room to the plots. Any other suggestion
would be useful. Thanks in advance.

-- 
José Alexandre Nalon
na...@te...

[Matplotlib-users] Lines and columns in legends

[Vasileios K. <bko...@gm...>]

Jae-Joon hi,

  I am a newbie with matplolib.  I need a horizontal legend because my
figures are pretty wide and I need to automate the process of generating it.


Since matplotlib does not support horizontal legends I am hacking around it.


I modified your example below. So the following works:


from matplotlib.pylab import *
from matplotlib.legend import Legend
from matplotlib.patches import Rectangle

#fig = figure()
ax = gca()
pl_list = []
for i in range(10):
    pl, = ax.plot(random(10))
    pl_list.append(pl)

xleg,yleg= 0.5,0.5

l1 = Legend(ax, pl_list[0:1], "0", loc=1)
hg1, wd1 = l1.get_frame().get_height(), l1.get_frame().get_width()
l2 = Legend(ax, pl_list[1:2], "1", loc=1)
hg2, wd2 = l2.get_frame().get_height(), l2.get_frame().get_width()
l3 = Legend(ax, pl_list[2:3], "2", loc=1)
hg3, wd3 = l3.get_frame().get_height(), l3.get_frame().get_width()
l4 = Legend(ax, pl_list[3:4], "3", loc=1)
hg4, wd4 = l4.get_frame().get_height(), l4.get_frame().get_width()

total_height = hg1
total_width = wd1+wd2+wd3+wd4

print total_height, total_width

l1 = Legend(ax, pl_list[0:1], "0", loc=(xleg, yleg))
l2 = Legend(ax, pl_list[1:2], "1", loc=(xleg+wd1/5, yleg))
l3 = Legend(ax, pl_list[2:3], "2", loc=(xleg+(wd1+wd2)/5, yleg))
l4 = Legend(ax, pl_list[3:4], "3", loc=(xleg+(wd1+wd2+wd3)/5, yleg))
l1.get_frame().set_visible(False) # make background frame of legends
invisible
l2.get_frame().set_visible(False)
l3.get_frame().set_visible(False)
l4.get_frame().set_visible(False)

# make a large background frame
rect = Rectangle((xleg, yleg), 0.45, 0.05, # adjust these values (in
normalized axes coordinate)
                 fc="w", ec="k",
                 transform=ax.transAxes, zorder=4)
ax.add_artist(rect)
ax.add_artist(l1)
ax.add_artist(l2)
ax.add_artist(l3)
ax.add_artist(l4)


The basic idea is to create a legend with the line and label I need and then
use its dimensions to create the background frame.

The problem is that the height and width I get are in different units that
the normalized axes coordinates and I do not know how

to properly transfrom them which leads to the hacky  /5   , otherwise the
legends are off the figure.

Any suggestions on how I can automate this part?

Thanks in advance.



Jae-Joon Lee
Thu, 09 Oct 2008 12:21:56 -0700

Although I think it is possible to calculate the bounding box of the
all legends automatically,
Here is a manual way.


from matplotlib.patches import Rectangle

l1.get_frame().set_visible(False) # make background frame of legends invisible
l2.get_frame().set_visible(False)

# make a large background frame
rect = Rectangle((0.05, 0.75), 0.3, 0.2, # adjust these values (in
normalized axes coordinate)
                 fc="w", ec="k",
                 transform=ax.transAxes, zorder=4)
ax.add_artist(rect)

I hope this help,

-JJ




On Thu, Oct 9, 2008 at 2:43 PM, José Alexandre Nalon <[EMAIL PROTECTED]> wrote:
> Hello,
>
> Em Thursday 09 October 2008 13:46:52 Jae-Joon Lee escreveu:
>> Meanwhile, you may try to make multiple legends as a posible workarounds.
>
> Thanks for your answer. That did the trick, and the figure
> looks more or less as I wanted. It would look exactly as I
> wanted if I could remove the border from the legends and
> draw a box around the legends. How could I do that?
>
> (I apologize if this seems trivial. I use matplotlib a lot,
> but standard functions always seem to do what I need, so I
> don't go deep in its behaviour).
>
> --
> José Alexandre Nalon
> [EMAIL PROTECTED]
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
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Re: [Matplotlib-users] Lines and columns in legends

[Jae-Joon L. <lee...@gm...>]

The recent version of the mpl now supports multi-column legend.

http://matplotlib.sourceforge.net/examples/pylab_examples/legend_demo3.html

Thus, it would be great if you to try the new version, and if your
problem is still not solved, please report it again.

Regards,

-JJ


On Sun, Apr 12, 2009 at 11:12 PM, Vasileios Kontorinis
<bko...@gm...> wrote:
> Jae-Joon hi,
>
>   I am a newbie with matplolib.  I need a horizontal legend because my
> figures are pretty wide and I need to automate the process of generating it.
>
> Since matplotlib does not support horizontal legends I am hacking around it.
>
> I modified your example below. So the following works:
>
> from matplotlib.pylab import *
> from matplotlib.legend import Legend
> from matplotlib.patches import Rectangle
>
> #fig = figure()
> ax = gca()
> pl_list = []
> for i in range(10):
>     pl, = ax.plot(random(10))
>     pl_list.append(pl)
>
> xleg,yleg= 0.5,0.5
>
> l1 = Legend(ax, pl_list[0:1], "0", loc=1)
> hg1, wd1 = l1.get_frame().get_height(), l1.get_frame().get_width()
> l2 = Legend(ax, pl_list[1:2], "1", loc=1)
> hg2, wd2 = l2.get_frame().get_height(), l2.get_frame().get_width()
> l3 = Legend(ax, pl_list[2:3], "2", loc=1)
> hg3, wd3 = l3.get_frame().get_height(), l3.get_frame().get_width()
> l4 = Legend(ax, pl_list[3:4], "3", loc=1)
> hg4, wd4 = l4.get_frame().get_height(), l4.get_frame().get_width()
>
> total_height = hg1
> total_width = wd1+wd2+wd3+wd4
>
> print total_height, total_width
>
> l1 = Legend(ax, pl_list[0:1], "0", loc=(xleg, yleg))
> l2 = Legend(ax, pl_list[1:2], "1", loc=(xleg+wd1/5, yleg))
> l3 = Legend(ax, pl_list[2:3], "2", loc=(xleg+(wd1+wd2)/5, yleg))
> l4 = Legend(ax, pl_list[3:4], "3", loc=(xleg+(wd1+wd2+wd3)/5, yleg))
> l1.get_frame().set_visible(False) # make background frame of legends
> invisible
> l2.get_frame().set_visible(False)
> l3.get_frame().set_visible(False)
> l4.get_frame().set_visible(False)
>
> # make a large background frame
> rect = Rectangle((xleg, yleg), 0.45, 0.05, # adjust these values (in
> normalized axes coordinate)
>                  fc="w", ec="k",
>                  transform=ax.transAxes, zorder=4)
> ax.add_artist(rect)
> ax.add_artist(l1)
> ax.add_artist(l2)
> ax.add_artist(l3)
> ax.add_artist(l4)
>
>
> The basic idea is to create a legend with the line and label I need and then
> use its dimensions to create the background frame.
>
> The problem is that the height and width I get are in different units that
> the normalized axes coordinates and I do not know how
>
> to properly transfrom them which leads to the hacky  /5   , otherwise the
> legends are off the figure.
>
> Any suggestions on how I can automate this part?
>
> Thanks in advance.
>
>
> Jae-Joon Lee
> Thu, 09 Oct 2008 12:21:56 -0700
>
> Although I think it is possible to calculate the bounding box of the
> all legends automatically,
> Here is a manual way.
>
>
> from matplotlib.patches import Rectangle
>
> l1.get_frame().set_visible(False) # make background frame of legends
> invisible
>
> l2.get_frame().set_visible(False)
>
> # make a large background frame
> rect = Rectangle((0.05, 0.75), 0.3, 0.2, # adjust these values (in
> normalized axes coordinate)
>                  fc="w", ec="k",
>
>                  transform=ax.transAxes, zorder=4)
> ax.add_artist(rect)
>
> I hope this help,
>
> -JJ
>
>
>
>
> On Thu, Oct 9, 2008 at 2:43 PM, José Alexandre Nalon <[EMAIL PROTECTED]>
> wrote:
>> Hello,
>
>>
>> Em Thursday 09 October 2008 13:46:52 Jae-Joon Lee escreveu:
>>> Meanwhile, you may try to make multiple legends as a posible workarounds.
>>
>> Thanks for your answer. That did the trick, and the figure
>
>> looks more or less as I wanted. It would look exactly as I
>> wanted if I could remove the border from the legends and
>> draw a box around the legends. How could I do that?
>>
>> (I apologize if this seems trivial. I use matplotlib a lot,
>
>> but standard functions always seem to do what I need, so I
>> don't go deep in its behaviour).
>>
>> --
>> José Alexandre Nalon
>> [EMAIL PROTECTED]
>>
>> -------------------------------------------------------------------------
>
>> This SF.Net email is sponsored by the Moblin Your Move Developer's
>> challenge
>> Build the coolest Linux based applications with Moblin SDK & win great
>> prizes
>> Grand prize is a trip for two to an Open Source event anywhere in the
>> world
>
>> http://moblin-contest.org/redirect.php?banner_id=100&url=/
>> _______________________________________________
>> Matplotlib-users mailing list
>
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>>
> -------------------------------------------------------------------------
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> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
>
> Grand prize is a trip for two to an Open Source event anywhere in the world
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Re: [Matplotlib-users] Lines and columns in legends

[Jae-Joon L. <lee...@gm...>]

The current legend class does not support multiple columns.
Eric Wertman once mentioned in this list that he would work on this
feature, but I don't know the current status.
A (partial) rewrite of the legend class which I plan to support
multicolumns is in my TODO list but I haven't started it yet.

Meanwhile, you may try to make multiple legends as a posible workarounds.
For example, following code plots 10 lines and make two legends, each
with 5 lines, one at upper left and one at upper right.


ax = gca()
pl_list = []
for i in range(10):
    pl, = ax.plot(random(10))
    pl_list.append(pl)

from matplotlib.legend import Legend
l1 = Legend(ax, pl_list[:5], "01234", loc=2)
l2 = Legend(ax, pl_list[5:], "56789", loc=1)
#l1 = Legend(ax, pl_list[:5], "01234", loc=(0.02, 0.72))
#l2 = Legend(ax, pl_list[5:], "56789", loc=(0.2, 0.72))

ax.add_artist(l1)
ax.add_artist(l2)

draw()


You may manually adjust the legend position to place the legends side
by side (see the commented lines), but it would be somewhat tricky if
you need 4 columns.

-JJ






On Thu, Oct 9, 2008 at 10:50 AM, José Alexandre Nalon
<na...@te...> wrote:
> Hello,
>
> Is there an easy way to make a legend with multiple lines
> and columns? I need 8 plots in the same figure, and the
> legend takes a lot of space. I believe that if I could
> orient the legend in multiple lines and columns (say, 2
> lines with four columns each), I could save a lot of
> space, giving more room to the plots. Any other suggestion
> would be useful. Thanks in advance.
>
> --
> José Alexandre Nalon
> na...@te...
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

Re: [Matplotlib-users] Lines and columns in legends

[José A. N. <na...@te...>]

Hello,

Em Thursday 09 October 2008 13:46:52 Jae-Joon Lee escreveu:
> Meanwhile, you may try to make multiple legends as a posible workarounds.

Thanks for your answer. That did the trick, and the figure
looks more or less as I wanted. It would look exactly as I
wanted if I could remove the border from the legends and
draw a box around the legends. How could I do that?

(I apologize if this seems trivial. I use matplotlib a lot,
but standard functions always seem to do what I need, so I
don't go deep in its behaviour).

-- 
José Alexandre Nalon
na...@te...

Re: [Matplotlib-users] Lines and columns in legends

[Jae-Joon L. <lee...@gm...>]

Although I think it is possible to calculate the bounding box of the
all legends automatically,
Here is a manual way.


from matplotlib.patches import Rectangle

l1.get_frame().set_visible(False) # make background frame of legends invisible
l2.get_frame().set_visible(False)

# make a large background frame
rect = Rectangle((0.05, 0.75), 0.3, 0.2, # adjust these values (in
normalized axes coordinate)
                 fc="w", ec="k",
                 transform=ax.transAxes, zorder=4)
ax.add_artist(rect)

I hope this help,

-JJ




On Thu, Oct 9, 2008 at 2:43 PM, José Alexandre Nalon <na...@te...> wrote:
> Hello,
>
> Em Thursday 09 October 2008 13:46:52 Jae-Joon Lee escreveu:
>> Meanwhile, you may try to make multiple legends as a posible workarounds.
>
> Thanks for your answer. That did the trick, and the figure
> looks more or less as I wanted. It would look exactly as I
> wanted if I could remove the border from the legends and
> draw a box around the legends. How could I do that?
>
> (I apologize if this seems trivial. I use matplotlib a lot,
> but standard functions always seem to do what I need, so I
> don't go deep in its behaviour).
>
> --
> José Alexandre Nalon
> na...@te...
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>