[Matplotlib-users] Matplotlib colors
I want to: 1. Have matplotlib assign the linecolor for a plot 2. Read the linecolor with .get_color() 3. Create another plot with the linecolor set to a lighter version of the previous linecolor. Ie: a, = plot(x,y) a.get_color() = 'b' b, = plot(x,y, color = #xx) Since I'm only using the standard matplotlib assigned colors which cycle through b,g,r,c,m,y,k I thought I would just create a mapping between each color and a lighter version. How do I get the hex or RGB string for the base matplotlib colors? Also, if there's a different property I can use to lighten the line color without changing the color that would be cool too. Cheers, Jonno. -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Matplotlib colors
On Wed, Nov 16, 2011 at 5:35 PM, Jonno jonnojohn...@gmail.com wrote:
I want to:
1. Have matplotlib assign the linecolor for a plot
2. Read the linecolor with .get_color()
3. Create another plot with the linecolor set to a lighter version of
the previous linecolor.
Ie:
a, = plot(x,y)
a.get_color() = 'b'
b, = plot(x,y, color = #xx)
Since I'm only using the standard matplotlib assigned colors which
cycle through b,g,r,c,m,y,k I thought I would just create a mapping
between each color and a lighter version.
How do I get the hex or RGB string for the base matplotlib colors?
There may be an easier way, but in the past I've used a color converter
object
(which seems unnecessarily verbose):
import matplotlib.colors as mcolors
cc = mcolors.ColorConverter()
cc.to_rgb('b')
(0, 0, 1)
Also, if there's a different property I can use to lighten the line
color without changing the color that would be cool too.
If you have a white background (and no overlapping markers/lines), you
could just set the alpha argument in the plot command.
Best,
-Tony
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Re: [Matplotlib-users] matplotlib colors vs html colors
On Sun, Apr 11, 2010 at 12:40 PM, Peter Butterworth butt...@gmail.com wrote:
sorry if this has been covered before, but I must say I've found the
following quite confusing :
color=cyan is not in fact equivalent to color='c'
in colors.py :
Commands which take color arguments can use several formats to specify
the colors. For the basic builtin colors, you can use a single letter
- b : blue
- g : green
- r : red
- c : cyan
- m : magenta
- y : yellow
- k : black
- w : white
in ColorConverter :
colors = {
'b' : (0.0, 0.0, 1.0),
'g' : (0.0, 0.5, 0.0),
'r' : (1.0, 0.0, 0.0),
'c' : (0.0, 0.75, 0.75),
'm' : (0.75, 0, 0.75),
'y' : (0.75, 0.75, 0),
'k' : (0.0, 0.0, 0.0),
'w' : (1.0, 1.0, 1.0),
}
we are told 'c' is short for cyan. Yet color=cyan is not equivalent
to color='c'
'cyan' : '#00'
In [50]: rgb2hex((0.0, 0.75, 0.75))
Out[50]: '#00bfbf'
Thank you for reporting.
It seems that it is not just c, but the rgb values of m and y
are also different.
In [26]: cc.to_rgb(magenta)
Out[26]: (1.0, 0.0, 1.0)
In [27]: cc.to_rgb(m)
Out[27]: (0.75, 0, 0.75)
In [30]: cc.to_rgb(yellow)
Out[30]: (1.0, 1.0, 0.0)
In [31]: cc.to_rgb(y)
Out[31]: (0.75, 0.75, 0)
John, the relevant code to define the colors attribute seems to be
written by you. Maybe this is some matlab convention? Can you comment
on this?
Regards,
-JJ
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Re: [Matplotlib-users] matplotlib colors vs html colors
On Wed, Apr 14, 2010 at 2:14 PM, Jae-Joon Lee lee.j.j...@gmail.com wrote: John, the relevant code to define the colors attribute seems to be written by you. Maybe this is some matlab convention? Can you comment on this? The original color letters did come from matlab, and some of the color RGB choices, like the background for the subplot gray, I got using a color picker on my screen for maximum compatibility, but I do not recall if that was the case for 'm', 'c' and 'y'. Most likely these were the rgb values of the matlab colors. The html colors were submitted later by another user, and apparently we never checked for consistency. I think this is a wart, and I don't feel strongly about keeping it or changing it for consistency in the trunk ahead of 1.0 (it should remain as is on the branch). If we change it on the trunk, we should change the single letter codes to correspond to the html full color name standards, rather than the other way around. JDH -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib colors vs html colors
John Hunter wrote: On Wed, Apr 14, 2010 at 2:14 PM, Jae-Joon Lee lee.j.j...@gmail.com wrote: John, the relevant code to define the colors attribute seems to be written by you. Maybe this is some matlab convention? Can you comment on this? The original color letters did come from matlab, and some of the color RGB choices, like the background for the subplot gray, I got using a color picker on my screen for maximum compatibility, but I do not recall if that was the case for 'm', 'c' and 'y'. Most likely these were the rgb values of the matlab colors. The html colors were submitted later by another user, and apparently we never checked for consistency. I think this is a wart, and I don't feel strongly about keeping it or changing it for consistency in the trunk ahead of 1.0 (it should remain as is on the branch). If we change it on the trunk, we should change the single letter codes to correspond to the html full color name standards, rather than the other way around. I would be cautious about making this change. At least on my laptop screen, with the default white axes background, the single-letter colors show up better than the html versions. It makes sense to me for the single-letter colors to be chosen for good visibility and contrast in actual use, not for consistency with the html names. In fact, I see no good argument for consistency in this case. Eric JDH -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib colors vs html colors
matlab colors seem to follow html : http://www.mathworks.com/access/helpdesk/help/techdoc/ref/colorspec.html I would agree that yellow is not very readable at all. Could possibly the short-hand colors be made user configurable in .matplotlibrc to suit individual taste ? In any case, this issue needs to be mentioned in the documentation. On Wed, Apr 14, 2010 at 9:58 PM, Eric Firing efir...@hawaii.edu wrote: John Hunter wrote: On Wed, Apr 14, 2010 at 2:14 PM, Jae-Joon Lee lee.j.j...@gmail.com wrote: John, the relevant code to define the colors attribute seems to be written by you. Maybe this is some matlab convention? Can you comment on this? The original color letters did come from matlab, and some of the color RGB choices, like the background for the subplot gray, I got using a color picker on my screen for maximum compatibility, but I do not recall if that was the case for 'm', 'c' and 'y'. Most likely these were the rgb values of the matlab colors. The html colors were submitted later by another user, and apparently we never checked for consistency. I think this is a wart, and I don't feel strongly about keeping it or changing it for consistency in the trunk ahead of 1.0 (it should remain as is on the branch). If we change it on the trunk, we should change the single letter codes to correspond to the html full color name standards, rather than the other way around. I would be cautious about making this change. At least on my laptop screen, with the default white axes background, the single-letter colors show up better than the html versions. It makes sense to me for the single-letter colors to be chosen for good visibility and contrast in actual use, not for consistency with the html names. In fact, I see no good argument for consistency in this case. Eric JDH -- thanks, peter butterworth -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib colors vs html colors
On Thu, Apr 15, 2010 at 5:16 AM, Peter Butterworth butt...@gmail.com wrote: matlab colors seem to follow html : http://www.mathworks.com/access/helpdesk/help/techdoc/ref/colorspec.html for c, m, y but not for green, where matplotlib does follow html ... -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] matplotlib colors vs html colors
sorry if this has been covered before, but I must say I've found the
following quite confusing :
color=cyan is not in fact equivalent to color='c'
in colors.py :
Commands which take color arguments can use several formats to specify
the colors. For the basic builtin colors, you can use a single letter
- b : blue
- g : green
- r : red
- c : cyan
- m : magenta
- y : yellow
- k : black
- w : white
in ColorConverter :
colors = {
'b' : (0.0, 0.0, 1.0),
'g' : (0.0, 0.5, 0.0),
'r' : (1.0, 0.0, 0.0),
'c' : (0.0, 0.75, 0.75),
'm' : (0.75, 0, 0.75),
'y' : (0.75, 0.75, 0),
'k' : (0.0, 0.0, 0.0),
'w' : (1.0, 1.0, 1.0),
}
we are told 'c' is short for cyan. Yet color=cyan is not equivalent
to color='c'
'cyan' : '#00'
In [50]: rgb2hex((0.0, 0.75, 0.75))
Out[50]: '#00bfbf'
--
Download Intel#174; Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
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