On Tue, Mar 24, 2009 at 9:27 AM, Jason Grout
<jason-s...@creativetrax.com> wrote:
>
> Jose Guzman wrote:
>> kcrisman wrote:
>>>
>>>> In looking at your code, I had an idea about specifying colors. Why
>>>> don't we have some default color objects defined in Sage, like red,
>>>> blue, yellow, green, etc. Methods could include .darker(), .lighter(),
>>>> etc. So you could specify a plot as:
>>>>
>>>> plot(x^2, (x,0,1), color=red)
>>>> plot(x^3, (x,0,1), color=blue.darker())
>>>> plot(x^4, (x,0,1), color=green.lighter())
>>>> plot(x^5, (x,0,1), color=red+blue) #gives purple :)
>>>>
>>>> and then for the more esoteric names (all of the standard web colors,
>>>> all of the standard x11 colors, etc.), use the color namespace.
>>>>
>>>> plot(sin(x), (x,0,1), color=color.goldenrod)
>>>>
>>> This sounds great; presumably it wouldn't be too hard to do, if very
>>> annoying (particularly because some of the plot methods only allow
>>> rgbcolor, others allow cmap options, etc.) - though what if I want red
>>> to stand for some other Python/Sage object? And of course only
>>> English colors would be there, and what about gray/grey ...
>>>
>>> By the way, other readers of this thread please note:
>>>
>>> sage: plot(x^2, (x,0,1), color='red')
>>>
>>> works fine!
>>>
>>> - kcrisman
>>>
>> I particularly like the rgbcolor notation. That's the only way I found
>> to have vector graphic environment (i.e inkscape) to match with
>> matplotlib or sage . On the other hand I usually use some kind of ...
>>
>> plot (x**2, (0,1), rgbcolor=(0.5,0.5,0) ) # dark green
>>
>> because I found the default green color (rgbcolor=(0,1,0)) looks too
>> brilliant with some beamers when you give a talk. Anyway, I tried with
>> rgbcolor='blue' ,'red','green','yellow','black','orange' and worked fine.
>
>
> Yes, I'm saying that in addition to being able to pass a tuple or
> string, we'd be able to pass a sage color object.
That's a great idea, which is why I implemented it over a year ago :-)
sage: C = Color('red') # a Sage color object
sage: C
RGB color (1.0, 0.0, 0.0)
sage: C.html_color()
'#ff0000'
sage: plot(x^2, (x,0,1), color=C)
I think the only strings allowed in the Color constructor are:
"red" : (1.0,0.0,0.0),
"orange": (1.0,.5,0.0),
"yellow": (1.0,1.0,0.0),
"green" : (0.0,1.0,0.0),
"blue" : (0.0,0.0,1.0),
"purple": (.5,0.0,1.0),
"white" : (1.0,1.0,1.0),
"black" : (0.0,0.0,0.0),
"grey" : (.5,.5,.5)
You can also use any html color strings.
To give the functionality you want, you could add methods "lighter()"
and "darker()" to the existing color object.
William
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support-unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://www.sagemath.org
-~----------~----~----~----~------~----~------~--~---
