matplotlib-users

[Matplotlib-users] Partial coloring of text in matplotlib

[Gökhan S. <gok...@gm...>]

Is there a way in matplotlib to partially specify the color of a string?

Example:

plt.ylabel("Today is cloudy.")
How can I show "today" as red, "is" as green and "cloudy." as blue?

Thanks.

PS: Asked also on
http://stackoverflow.com/questions/9169052/partial-coloring-of-text-in-matplotlib

-- 
Gökhan

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Michael D. <md...@st...>]

Nope.  But it's something I've wanted to add for a while.  Can you file 
an Issue in the github tracker?

Mike

On 02/07/2012 11:40 AM, Gökhan Sever wrote:
> Is there a way in matplotlib to partially specify the color of a string?
>
> Example:
>
> plt.ylabel("Today is cloudy.")
> How can I show "today" as red, "is" as green and "cloudy." as blue?
>
> Thanks.
>
> PS: Asked also on 
> http://stackoverflow.com/questions/9169052/partial-coloring-of-text-in-matplotlib
>
> -- 
> Gökhan
>
>
> ------------------------------------------------------------------------------
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Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Gökhan S. <gok...@gm...>]

Posted at https://github.com/matplotlib/matplotlib/issues/697

I think a syntax like:

plt.ylabel("Sun is shining.", color='rgb')

would be a good start. (Assuming len of string == len of colors)

On Tue, Feb 7, 2012 at 11:18 AM, Michael Droettboom <md...@st...> wrote:

>  Nope.  But it's something I've wanted to add for a while.  Can you file
> an Issue in the github tracker?
>
> Mike
>
>
> On 02/07/2012 11:40 AM, Gökhan Sever wrote:
>
> Is there a way in matplotlib to partially specify the color of a string?
>
>  Example:
>
>  plt.ylabel("Today is cloudy.")
> How can I show "today" as red, "is" as green and "cloudy." as blue?
>
>  Thanks.
>
>  PS: Asked also on
> http://stackoverflow.com/questions/9169052/partial-coloring-of-text-in-matplotlib
>
>  --
> Gökhan
>
>
> ------------------------------------------------------------------------------
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>
>
> _______________________________________________
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>
>
>
>
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-- 
Gökhan

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Benjamin R. <ben...@ou...>]

On Tue, Feb 7, 2012 at 12:38 PM, Gökhan Sever <gok...@gm...> wrote:

> Posted at https://github.com/matplotlib/matplotlib/issues/697
>
> I think a syntax like:
>
> plt.ylabel("Sun is shining.", color='rgb')
>
> would be a good start. (Assuming len of string == len of colors)
>
>
Don't know if I like that.  It becomes even more difficult to convert the
color spec into rgb.  How about this?

plt.ylabel(['Sun", "is", "shining"], color=['r', 'g', 'b'])

By having the input label be an array, that would force ylabel to recognize
that the color sequence should also be treated similarly.

Ben Root

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Gökhan S. <gok...@gm...>]

This works as well, as long as it functions :)

My idea requires little less typing. But forgot previously, text string
should be whitespace split.

On Tue, Feb 7, 2012 at 11:43 AM, Benjamin Root <ben...@ou...> wrote:

>
>
> On Tue, Feb 7, 2012 at 12:38 PM, Gökhan Sever <gok...@gm...>wrote:
>
>> Posted at https://github.com/matplotlib/matplotlib/issues/697
>>
>> I think a syntax like:
>>
>> plt.ylabel("Sun is shining.", color='rgb')
>>
>> would be a good start. (Assuming len of string == len of colors)
>>
>>
> Don't know if I like that.  It becomes even more difficult to convert the
> color spec into rgb.  How about this?
>
> plt.ylabel(['Sun", "is", "shining"], color=['r', 'g', 'b'])
>
> By having the input label be an array, that would force ylabel to
> recognize that the color sequence should also be treated similarly.
>
> Ben Root
>
>


-- 
Gökhan

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Ryan M. <rm...@gm...>]

On Tue, Feb 7, 2012 at 12:49 PM, Gökhan Sever <gok...@gm...> wrote:
> This works as well, as long as it functions :)
>
> My idea requires little less typing. But forgot previously, text string
> should be whitespace split.

Right, but we shouldn't guess. If we automatically split on
whitespace, this becomes harder:

plt.ylabel(["The sun is", "yellow"], ['k', 'y'])

Ryan

-- 
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Gökhan S. <gok...@gm...>]

I was basing my whitespace split idea on single string assumption --eg. no
list passing.

I do not have a strong preference on the final argument passing, as long as
it works instead of manually placing the texts on figure or axis :)



On Tue, Feb 7, 2012 at 11:52 AM, Ryan May <rm...@gm...> wrote:

> On Tue, Feb 7, 2012 at 12:49 PM, Gökhan Sever <gok...@gm...>
> wrote:
> > This works as well, as long as it functions :)
> >
> > My idea requires little less typing. But forgot previously, text string
> > should be whitespace split.
>
> Right, but we shouldn't guess. If we automatically split on
> whitespace, this becomes harder:
>
> plt.ylabel(["The sun is", "yellow"], ['k', 'y'])
>
> Ryan
>
> --
> Ryan May
> Graduate Research Assistant
> School of Meteorology
> University of Oklahoma
>



-- 
Gökhan

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Benjamin R. <ben...@ou...>]

On Tue, Feb 7, 2012 at 1:15 PM, Gökhan Sever <gok...@gm...> wrote:

> I was basing my whitespace split idea on single string assumption --eg. no
> list passing.
>
> I do not have a strong preference on the final argument passing, as long
> as it works instead of manually placing the texts on figure or axis :)
>
>
>
> On Tue, Feb 7, 2012 at 11:52 AM, Ryan May <rm...@gm...> wrote:
>
>> On Tue, Feb 7, 2012 at 12:49 PM, Gökhan Sever <gok...@gm...>
>> wrote:
>> > This works as well, as long as it functions :)
>> >
>> > My idea requires little less typing. But forgot previously, text string
>> > should be whitespace split.
>>
>> Right, but we shouldn't guess. If we automatically split on
>> whitespace, this becomes harder:
>>
>> plt.ylabel(["The sun is", "yellow"], ['k', 'y'])
>>
>> Ryan
>>
>>
I think the python mantra of "explicit over implicit" should be followed
here.  I don't think we currently allow list of strings, so there is no
risk of breaking existing scripts, I think.  We probably should confirm
that just in case.

Also, how deep should this rabbit hole go?  I could imagine one could want
this for title() and figtitle().  Maybe it would be best to implement this
at the Text() constructor level?

Ben Root

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Gökhan S. <gok...@gm...>]

On Tue, Feb 7, 2012 at 12:46 PM, Benjamin Root <ben...@ou...> wrote:

>
>
> On Tue, Feb 7, 2012 at 1:15 PM, Gökhan Sever <gok...@gm...>wrote:
>
>> I was basing my whitespace split idea on single string assumption --eg.
>> no list passing.
>>
>> I do not have a strong preference on the final argument passing, as long
>> as it works instead of manually placing the texts on figure or axis :)
>>
>>
>>
>> On Tue, Feb 7, 2012 at 11:52 AM, Ryan May <rm...@gm...> wrote:
>>
>>> On Tue, Feb 7, 2012 at 12:49 PM, Gökhan Sever <gok...@gm...>
>>> wrote:
>>> > This works as well, as long as it functions :)
>>> >
>>> > My idea requires little less typing. But forgot previously, text string
>>> > should be whitespace split.
>>>
>>> Right, but we shouldn't guess. If we automatically split on
>>> whitespace, this becomes harder:
>>>
>>> plt.ylabel(["The sun is", "yellow"], ['k', 'y'])
>>>
>>> Ryan
>>>
>>>
> I think the python mantra of "explicit over implicit" should be followed
> here.  I don't think we currently allow list of strings, so there is no
> risk of breaking existing scripts, I think.  We probably should confirm
> that just in case.
>
>
Fair enough.


> Also, how deep should this rabbit hole go?  I could imagine one could want
> this for title() and figtitle().  Maybe it would be best to implement this
> at the Text() constructor level?
>

ylabel text coloring works for me for the time being. However, a general
implementation would possibly fulfill other incoming requests.


>
> Ben Root
>
>


-- 
Gökhan

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Michael D. <md...@st...>]

In the past, I've thought having some sort of "HTML-lite" subset would 
be the most powerful here.  So one could do:

    title("This is <b>bold</b>")

Strictly speaking, for colors, one would do:

    title("This is <font color='red'>red</font>")

but that's awfully verbose.  I wouldn't have a problem fudging the spec 
and supporting:

    title("This is <red>red</red>")

since this would never be full-fledged HTML anyway [1].

The advantage of this approach over any of the list-based ones is that 
different properties can be nested, and I think most people understand 
the basics of HTML/XML tags.

And I agree with Benjamin, that this should be at the Text() constructor 
level so it works everywhere.  I envision it being a sort of peer text 
parser just as the mathtext parser is now -- in fact a lot of the 
mathtext machinery would be reused.

[1] Of course, I've also considered using something like PythonWebKit to 
render text for us -- the advantage being we'd also get proper bidi and 
other internationalization features.  But (a) WebKit is another honking 
dependency and (b) I'm not sure the Python bindings are ready for prime 
time.

Mike

On 02/07/2012 02:46 PM, Benjamin Root wrote:
>
>
> On Tue, Feb 7, 2012 at 1:15 PM, Gökhan Sever <gok...@gm... 
> <mailto:gok...@gm...>> wrote:
>
>     I was basing my whitespace split idea on single string assumption
>     --eg. no list passing.
>
>     I do not have a strong preference on the final argument passing,
>     as long as it works instead of manually placing the texts on
>     figure or axis :)
>
>
>
>     On Tue, Feb 7, 2012 at 11:52 AM, Ryan May <rm...@gm...
>     <mailto:rm...@gm...>> wrote:
>
>         On Tue, Feb 7, 2012 at 12:49 PM, Gökhan Sever
>         <gok...@gm... <mailto:gok...@gm...>> wrote:
>         > This works as well, as long as it functions :)
>         >
>         > My idea requires little less typing. But forgot previously,
>         text string
>         > should be whitespace split.
>
>         Right, but we shouldn't guess. If we automatically split on
>         whitespace, this becomes harder:
>
>         plt.ylabel(["The sun is", "yellow"], ['k', 'y'])
>
>         Ryan
>
>
> I think the python mantra of "explicit over implicit" should be 
> followed here.  I don't think we currently allow list of strings, so 
> there is no risk of breaking existing scripts, I think.  We probably 
> should confirm that just in case.
>
> Also, how deep should this rabbit hole go?  I could imagine one could 
> want this for title() and figtitle().  Maybe it would be best to 
> implement this at the Text() constructor level?
>
> Ben Root
>
>
>
> ------------------------------------------------------------------------------
> Keep Your Developer Skills Current with LearnDevNow!
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> Metro Style Apps, more. Free future releases when you subscribe now!
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>
>
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> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Jason G. <jas...@cr...>]

On 2/7/12 2:47 PM, Michael Droettboom wrote:
> since this would never be full-fledged HTML anyway [1].

Famous last words, right?

I'm curious: for the SVG backend, or a possible html5 canvas backend, 
can we already include html?  I don't know, but I'm curious.

Jason

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Paul I. <piv...@gm...>]

Benjamin Root, on 2012-02-07 13:46,  wrote:
> Also, how deep should this rabbit hole go?  I could imagine one could want
> this for title() and figtitle().  Maybe it would be best to implement this
> at the Text() constructor level?

For this reason, I would discourage even implementing such
functionality in the core of matplotlib. This functionality doesn't strike me
as something that ought to be available everywhere by default - if someone
needs it, they can implement it as follows:

-----
import matplotlib.pyplot as plt
from matplotlib import transforms

def rainbow_text(x,y,ls,lc,**kw):
    """
    Take a list of strings ``ls`` and colors ``lc`` and place them next to each
    other, with text ls[i] being shown in color lc[i].

    This example shows how to do both vertical and horizontal text, and will
    pass all keyword arguments to plt.text, so you can set the font size,
    family, etc.
    """
    t = plt.gca().transData
    fig = plt.gcf()
    plt.show()

    #horizontal version
    for s,c in zip(ls,lc):
        text = plt.text(x,y," "+s+" ",color=c, transform=t, **kw)
        text.draw(fig.canvas.get_renderer())
        ex = text.get_window_extent()
        t = transforms.offset_copy(text._transform, x=ex.width, units='dots')

    #vertical version
    for s,c in zip(ls,lc):
        text = plt.text(x,y," "+s+" ",color=c, transform=t,
                rotation=90,va='bottom',ha='center',**kw)
        text.draw(fig.canvas.get_renderer())
        ex = text.get_window_extent()
        t = transforms.offset_copy(text._transform, y=ex.height, units='dots')


plt.figure()
rainbow_text(0.5,0.5,"all unicorns poop rainbows ! ! !".split(), 
        ['red', 'orange', 'brown', 'green', 'blue', 'purple', 'black'],
        size=40)

best,
-- 
Paul Ivanov
314 address only used for lists,  off-list direct email at:
http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Yann T. <yan...@bu...>]

Along the lines of Mike's suggestion, I thought this could be done using
Latex.


I posted an answer on SO with an example of doing this, but it seems only
to work with postscript backend. Other backends override the color with the
mpl text color setting.

Is there a way to prevent this override? For example don't try to use 'PS'
backend, and look at hte figure interactively. It defaults to black.

http://stackoverflow.com/a/9185143/717357

-Yann



On Tue, Feb 7, 2012 at 4:46 PM, Paul Ivanov <piv...@gm...> wrote:

> Benjamin Root, on 2012-02-07 13:46,  wrote:
> > Also, how deep should this rabbit hole go?  I could imagine one could
> want
> > this for title() and figtitle().  Maybe it would be best to implement
> this
> > at the Text() constructor level?
>
> For this reason, I would discourage even implementing such
> functionality in the core of matplotlib. This functionality doesn't strike
> me
> as something that ought to be available everywhere by default - if someone
> needs it, they can implement it as follows:
>
> -----
> import matplotlib.pyplot as plt
> from matplotlib import transforms
>
> def rainbow_text(x,y,ls,lc,**kw):
>    """
>    Take a list of strings ``ls`` and colors ``lc`` and place them next to
> each
>    other, with text ls[i] being shown in color lc[i].
>
>    This example shows how to do both vertical and horizontal text, and will
>    pass all keyword arguments to plt.text, so you can set the font size,
>    family, etc.
>    """
>    t = plt.gca().transData
>    fig = plt.gcf()
>    plt.show()
>
>    #horizontal version
>    for s,c in zip(ls,lc):
>        text = plt.text(x,y," "+s+" ",color=c, transform=t, **kw)
>        text.draw(fig.canvas.get_renderer())
>        ex = text.get_window_extent()
>        t = transforms.offset_copy(text._transform, x=ex.width,
> units='dots')
>
>    #vertical version
>    for s,c in zip(ls,lc):
>        text = plt.text(x,y," "+s+" ",color=c, transform=t,
>                rotation=90,va='bottom',ha='center',**kw)
>        text.draw(fig.canvas.get_renderer())
>        ex = text.get_window_extent()
>        t = transforms.offset_copy(text._transform, y=ex.height,
> units='dots')
>
>
> plt.figure()
> rainbow_text(0.5,0.5,"all unicorns poop rainbows ! ! !".split(),
>        ['red', 'orange', 'brown', 'green', 'blue', 'purple', 'black'],
>        size=40)
>
> best,
> --
> Paul Ivanov
> 314 address only used for lists,  off-list direct email at:
> http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7
>
>
> ------------------------------------------------------------------------------
> Keep Your Developer Skills Current with LearnDevNow!
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>

Re: [Matplotlib-users] Partial coloring of text in matplotlib

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

What can be done with the current Matplotlib is to use the offset boxes.
Here is a modified version of a code snippet from

 http://abitofpythonabitofastronomy.blogspot.com/2009/05/mpl-multicolor-text.html

Regards,

-JJ


from matplotlib.offsetbox import HPacker, TextArea, AnnotationBbox

f = figure(1)
ax = f.add_subplot(111)

txt1 = TextArea("A$^3$", textprops=dict(color="r", size=150))
txt2 = TextArea("gb", textprops=dict(color="k", size=150))

txt = HPacker(children=[txt1, txt2],
            align="baseline",
            pad=0, sep=0)

bbox =  AnnotationBbox(txt, xy=(0.5, 0.5),
                       xycoords='data',
                       frameon=False,
                       box_alignment=(0.5, 0.5), # alignment center, center
                       )

ax.add_artist(bbox)

show()





On Wed, Feb 8, 2012 at 7:44 AM, Yann Tambouret <yan...@bu...> wrote:
> Along the lines of Mike's suggestion, I thought this could be done using
> Latex.
>
>
> I posted an answer on SO with an example of doing this, but it seems only to
> work with postscript backend. Other backends override the color with the mpl
> text color setting.
>
> Is there a way to prevent this override? For example don't try to use 'PS'
> backend, and look at hte figure interactively. It defaults to black.
>
> http://stackoverflow.com/a/9185143/717357
>
> -Yann
>
>
>
>
> On Tue, Feb 7, 2012 at 4:46 PM, Paul Ivanov <piv...@gm...> wrote:
>>
>> Benjamin Root, on 2012-02-07 13:46,  wrote:
>> > Also, how deep should this rabbit hole go?  I could imagine one could
>> > want
>> > this for title() and figtitle().  Maybe it would be best to implement
>> > this
>> > at the Text() constructor level?
>>
>> For this reason, I would discourage even implementing such
>> functionality in the core of matplotlib. This functionality doesn't strike
>> me
>> as something that ought to be available everywhere by default - if someone
>> needs it, they can implement it as follows:
>>
>> -----
>> import matplotlib.pyplot as plt
>> from matplotlib import transforms
>>
>> def rainbow_text(x,y,ls,lc,**kw):
>>    """
>>    Take a list of strings ``ls`` and colors ``lc`` and place them next to
>> each
>>    other, with text ls[i] being shown in color lc[i].
>>
>>    This example shows how to do both vertical and horizontal text, and
>> will
>>    pass all keyword arguments to plt.text, so you can set the font size,
>>    family, etc.
>>    """
>>    t = plt.gca().transData
>>    fig = plt.gcf()
>>    plt.show()
>>
>>    #horizontal version
>>    for s,c in zip(ls,lc):
>>        text = plt.text(x,y," "+s+" ",color=c, transform=t, **kw)
>>        text.draw(fig.canvas.get_renderer())
>>        ex = text.get_window_extent()
>>        t = transforms.offset_copy(text._transform, x=ex.width,
>> units='dots')
>>
>>    #vertical version
>>    for s,c in zip(ls,lc):
>>        text = plt.text(x,y," "+s+" ",color=c, transform=t,
>>                rotation=90,va='bottom',ha='center',**kw)
>>        text.draw(fig.canvas.get_renderer())
>>        ex = text.get_window_extent()
>>        t = transforms.offset_copy(text._transform, y=ex.height,
>> units='dots')
>>
>>
>> plt.figure()
>> rainbow_text(0.5,0.5,"all unicorns poop rainbows ! ! !".split(),
>>        ['red', 'orange', 'brown', 'green', 'blue', 'purple', 'black'],
>>        size=40)
>>
>> best,
>> --
>> Paul Ivanov
>> 314 address only used for lists,  off-list direct email at:
>> http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7
>>
>>
>> ------------------------------------------------------------------------------
>> Keep Your Developer Skills Current with LearnDevNow!
>> The most comprehensive online learning library for Microsoft developers
>> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
>> Metro Style Apps, more. Free future releases when you subscribe now!
>> http://p.sf.net/sfu/learndevnow-d2d
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>
>
> ------------------------------------------------------------------------------
> Keep Your Developer Skills Current with LearnDevNow!
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>

Re: [Matplotlib-users] Partial coloring of text in matplotlib

[Gökhan S. <gok...@gm...>]

This is the solution which requires the least modification to the original
text inserting functions. The only drawback is like you said, it only works
with ps backend.

Any idea if this could be generalized for other backends?

On Tue, Feb 7, 2012 at 3:44 PM, Yann Tambouret <yan...@bu...> wrote:

> Along the lines of Mike's suggestion, I thought this could be done using
> Latex.
>
>
> I posted an answer on SO with an example of doing this, but it seems only
> to work with postscript backend. Other backends override the color with the
> mpl text color setting.
>
> Is there a way to prevent this override? For example don't try to use 'PS'
> backend, and look at hte figure interactively. It defaults to black.
>
> http://stackoverflow.com/a/9185143/717357
>
> -Yann
>
>
>
>
> On Tue, Feb 7, 2012 at 4:46 PM, Paul Ivanov <piv...@gm...> wrote:
>
>> Benjamin Root, on 2012-02-07 13:46,  wrote:
>> > Also, how deep should this rabbit hole go?  I could imagine one could
>> want
>> > this for title() and figtitle().  Maybe it would be best to implement
>> this
>> > at the Text() constructor level?
>>
>> For this reason, I would discourage even implementing such
>> functionality in the core of matplotlib. This functionality doesn't
>> strike me
>> as something that ought to be available everywhere by default - if someone
>> needs it, they can implement it as follows:
>>
>> -----
>> import matplotlib.pyplot as plt
>> from matplotlib import transforms
>>
>> def rainbow_text(x,y,ls,lc,**kw):
>>    """
>>    Take a list of strings ``ls`` and colors ``lc`` and place them next to
>> each
>>    other, with text ls[i] being shown in color lc[i].
>>
>>    This example shows how to do both vertical and horizontal text, and
>> will
>>    pass all keyword arguments to plt.text, so you can set the font size,
>>    family, etc.
>>    """
>>    t = plt.gca().transData
>>    fig = plt.gcf()
>>    plt.show()
>>
>>    #horizontal version
>>    for s,c in zip(ls,lc):
>>        text = plt.text(x,y," "+s+" ",color=c, transform=t, **kw)
>>        text.draw(fig.canvas.get_renderer())
>>        ex = text.get_window_extent()
>>        t = transforms.offset_copy(text._transform, x=ex.width,
>> units='dots')
>>
>>    #vertical version
>>    for s,c in zip(ls,lc):
>>        text = plt.text(x,y," "+s+" ",color=c, transform=t,
>>                rotation=90,va='bottom',ha='center',**kw)
>>        text.draw(fig.canvas.get_renderer())
>>        ex = text.get_window_extent()
>>        t = transforms.offset_copy(text._transform, y=ex.height,
>> units='dots')
>>
>>
>> plt.figure()
>> rainbow_text(0.5,0.5,"all unicorns poop rainbows ! ! !".split(),
>>        ['red', 'orange', 'brown', 'green', 'blue', 'purple', 'black'],
>>        size=40)
>>
>> best,
>> --
>> Paul Ivanov
>> 314 address only used for lists,  off-list direct email at:
>> http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7
>>
>>
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>
>
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-- 
Gökhan