setting the default markerfacecolor

Hi,
i am farily new to matplotlib so my question might be fairly basic. I would
like to be able to set certain default values at the beginning of my script.
The way i did this with the other values is via changing the value stored in
rcparams. So something like:
import matplotlib.pyplot as mpl
mpl.rcParams['lines.markersize'] = 20

But i would like to set the markerfacecolor in such a way but it is not
included in rcParams. I would really like to avoid setting it in each
individual plot call.

Is there a way to change the default at the start of the script?

thanks
matt

Matt Funk, on 2011-04-07 16:52, wrote:

Hi,
i am farily new to matplotlib so my question might be fairly basic. I would
like to be able to set certain default values at the beginning of my script.
The way i did this with the other values is via changing the value stored in
rcparams. So something like:
import matplotlib.pyplot as mpl
mpl.rcParams['lines.markersize'] = 20

But i would like to set the markerfacecolor in such a way but it is not
included in rcParams. I would really like to avoid setting it in each
individual plot call.

Is there a way to change the default at the start of the script?

Hi Matt,

this depends on how you're plotting.

If you're just using plt.plot - it defers to cycling through the
rcParams['axes.color_cycle'] - so just set that to one value
before starting your plots..

old_color_cycle = rcParams['axes.color_cycle']
rcParams['axes.color_cycle'] = 'purple' # cue Gogol Bordello
plt.figure()
ax = plt.subplot(111)

ax.plot(range(10),'o', markersize=40)
ax.plot(np.random.rand(10),'o', markersize=40)
ax.plot(np.random.rand(10)*10,'o', markersize=40)

# restore color_cycle just for this axes
ax._get_lines.set_color_cycle(old_color_cycle)
ax.plot(range(20,30), range(10),'o', markersize=40)
ax.plot(range(20,30), np.random.rand(10),'o', markersize=40)
ax.plot(range(20,30), np.random.rand(10)*10,'o', markersize=40)

# restore old cycle for all new axes
rcParams['axes.color_cycle'] = old_color_cycle

···

--

If, on the other hand, you're using scatter, there isn't
currently a way of doing the same, since scatter just uses 'b' as
the default parameter for color.

This should probably be changed to act the same way plot does,
but that isn't currently implemented. This would be a good first
patch for a newcomer -- and would make matplotlib more consistent.

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

Hi Paul,

thanks for the response. Emmhh, i am not sure what's going on since what you
are saying matches what's listed at
http://matplotlib.sourceforge.net/users/customizing.html. The problem is that
when i try it I get a key error, correspondingly, when i print rcParams i
cannot find axes.color_cycle key:

So printing rcParams gives:
print mpl.rcParams
{'figure.subplot.right': 0.90000000000000002, 'mathtext.cal': 'cursive',
'font.fantasy': ['Comic Sans MS', 'Chicago', 'Charcoal', 'ImpactWestern',
'fantasy'], 'xtick.minor.pad': 4, 'tk.pythoninspect': False, 'image.aspect':
'equal', 'font.cursive': ['Apple Chancery', 'Textile', 'Zapf Chancery',
'Sand', 'cursive'], 'figure.subplot.hspace': 0.20000000000000001,
'xtick.direction': 'out', 'axes.facecolor': 'w', 'mathtext.fontset': 'cm',
'ytick.direction': 'out', 'svg.image_inline': True, 'lines.markersize': 10.0,
'figure.dpi': 80, 'text.usetex': True, 'text.fontangle': 'normal',
'patch.edgecolor': 'k', 'legend.labelspacing': 0.5, 'ps.useafm': False,
'mathtext.bf': 'serif:bold', 'lines.solid_joinstyle': 'round',
'font.monospace': ['Bitstream Vera Sans Mono', 'DejaVu Sans Mono', 'Andale
Mono', 'Nimbus Mono L', 'Courier New', 'Courier', 'Fixed', 'Terminal',
'monospace'], 'xtick.minor.size': 2, 'axes.formatter.limits': [-7, 7],
'figure.subplot.wspace': 0.20000000000000001, 'savefig.edgecolor': 'w',
'text.fontvariant': 'normal', 'image.cmap': 'jet', 'axes.edgecolor': 'k',
'tk.window_focus': False, 'image.origin': 'upper', 'text.fontsize': 'medium',
'font.serif': ['Bitstream Vera Serif', 'DejaVu Serif', 'New Century
Schoolbook', 'Century Schoolbook L', 'Utopia', 'ITC Bookman', 'Bookman',
'Nimbus Roman No9 L', 'Times New Roman', 'Times', 'Palatino', 'Charter',
'serif'], 'savefig.facecolor': 'w', 'maskedarray': 'obsolete',
'ytick.minor.size': 2, 'numerix': 'obsolete', 'font.stretch': 'normal',
'text.dvipnghack': None, 'ytick.color': 'k', 'lines.linestyle': '-',
'xtick.color': 'k', 'xtick.major.pad': 4, 'text.fontweight': 'normal',
'patch.facecolor': 'b', 'figure.figsize': [8.0, 6.0], 'axes.linewidth': 1.0,
'legend.handletextpad': 0.80000000000000004, 'mathtext.fallback_to_cm': True,
'lines.linewidth': 1.0, 'savefig.dpi': 100, 'verbose.fileo': 'sys.stdout',
'svg.image_noscale': False, 'docstring.hardcopy': False, 'font.size': 24.0,
'ps.fonttype': 3, 'path.simplify': True, 'polaraxes.grid': True, 'toolbar':
'toolbar2', 'pdf.compression': 6, 'grid.linewidth': 0.5, 'figure.autolayout':
False, 'figure.facecolor': '0.75', 'ps.usedistiller': False, 'legend.isaxes':
True, 'figure.edgecolor': 'w', 'mathtext.tt': 'monospace',
'contour.negative_linestyle': 'dashed', 'image.interpolation': 'bilinear',
'lines.markeredgewidth': 1.5, 'axes3d.grid': True, 'lines.marker': 'None',
'legend.shadow': False, 'axes.titlesize': 24.0, 'backend': 'TkAgg',
'xtick.major.size': 4, 'legend.fontsize': 24.0, 'lines.solid_capstyle':
'projecting', 'mathtext.it': 'serif:italic', 'font.variant': 'normal',
'xtick.labelsize': 'medium', 'axes.unicode_minus': True, 'ps.distiller.res':
6000, 'pdf.fonttype': 3, 'patch.linewidth': 1.0, 'pdf.inheritcolor': False,
'lines.dash_capstyle': 'butt', 'lines.color': 'b', 'text.latex.preview':
False, 'figure.subplot.top': 0.90000000000000002, 'pdf.use14corefonts': False,
'legend.markerscale': 1.0, 'patch.antialiased': True, 'font.style': 'normal',
'backend_fallback': True, 'legend.fancybox': True, 'grid.linestyle': ':',
'axes.labelcolor': 'k', 'text.color': 'k', 'mathtext.rm': 'serif',
'legend.loc': 'upper right', 'interactive': False, 'cairo.format': 'png',
'savefig.orientation': 'portrait', 'axes.axisbelow': False, 'ytick.major.size':
4, 'axes.grid': False, 'plugins.directory': '.matplotlib_plugins',
'grid.color': 'k', 'timezone': 'UTC', 'ytick.major.pad': 4,
'legend.borderpad': 0.40000000000000002, 'lines.dash_joinstyle': 'round',
'datapath': '/usr/share/matplotlib/mpl-data', 'lines.antialiased': True,
'text.latex.unicode': False, 'image.lut': 256, 'units': False,
'figure.subplot.bottom': 0.10000000000000001, 'text.latex.preamble': [''],
'legend.numpoints': 2, 'legend.handlelength': 2.0, 'font.sans-serif':
['Arial'], 'font.family': 'sans-serif', 'axes.labelsize': 24.0,
'ytick.minor.pad': 4, 'legend.borderaxespad': 0.5, 'mathtext.sf': 'sans\\-
serif', 'axes.hold': True, 'verbose.level': 'silent', 'mathtext.default':
'it', 'figure.subplot.left': 0.125, 'legend.columnspacing': 2.0,
'text.fontstyle': 'normal', 'font.weight': 'normal', 'image.resample': False,
'agg.path.chunksize': 0, 'path.simplify_threshold': 0.1111111111111111,
'ytick.labelsize': 'medium', 'ps.papersize': 'letter', 'svg.embed_char_paths':
True}

(sorry for the long post).
Anything obvious that i am doing wrong? I am using:
Python 2.6.6
mpl.__version__ = 0.99.3

thanks
matt

···

On Thursday, April 07, 2011, Paul Ivanov wrote:

Matt Funk, on 2011-04-07 16:52, wrote:
> Hi,
> i am farily new to matplotlib so my question might be fairly basic. I
> would like to be able to set certain default values at the beginning of
> my script. The way i did this with the other values is via changing the
> value stored in rcparams. So something like:
> import matplotlib.pyplot as mpl
> mpl.rcParams['lines.markersize'] = 20
>
> But i would like to set the markerfacecolor in such a way but it is not
> included in rcParams. I would really like to avoid setting it in each
> individual plot call.
>
> Is there a way to change the default at the start of the script?

Hi Matt,

this depends on how you're plotting.

If you're just using plt.plot - it defers to cycling through the
rcParams['axes.color_cycle'] - so just set that to one value
before starting your plots..

old_color_cycle = rcParams['axes.color_cycle']
rcParams['axes.color_cycle'] = 'purple' # cue Gogol Bordello
plt.figure()
ax = plt.subplot(111)

ax.plot(range(10),'o', markersize=40)
ax.plot(np.random.rand(10),'o', markersize=40)
ax.plot(np.random.rand(10)*10,'o', markersize=40)

# restore color_cycle just for this axes
ax._get_lines.set_color_cycle(old_color_cycle)
ax.plot(range(20,30), range(10),'o', markersize=40)
ax.plot(range(20,30), np.random.rand(10),'o', markersize=40)
ax.plot(range(20,30), np.random.rand(10)*10,'o', markersize=40)

# restore old cycle for all new axes
rcParams['axes.color_cycle'] = old_color_cycle
--

If, on the other hand, you're using scatter, there isn't
currently a way of doing the same, since scatter just uses 'b' as
the default parameter for color.

This should probably be changed to act the same way plot does,
but that isn't currently implemented. This would be a good first
patch for a newcomer -- and would make matplotlib more consistent.

best,

Hi Paul,

thanks for the response. Emmhh, i am not sure what's going on since what you
are saying matches what's listed at
http://matplotlib.sourceforge.net/users/customizing.html. The problem is that
when i try it I get a key error, correspondingly, when i print rcParams i
cannot find axes.color_cycle key:

It is quite new, so your mpl version is too old to have it.

Eric

···

On 04/08/2011 10:56 AM, Matt Funk wrote:

So printing rcParams gives:
print mpl.rcParams
{'figure.subplot.right': 0.90000000000000002, 'mathtext.cal': 'cursive',
'font.fantasy': ['Comic Sans MS', 'Chicago', 'Charcoal', 'ImpactWestern',
'fantasy'], 'xtick.minor.pad': 4, 'tk.pythoninspect': False, 'image.aspect':
'equal', 'font.cursive': ['Apple Chancery', 'Textile', 'Zapf Chancery',
'Sand', 'cursive'], 'figure.subplot.hspace': 0.20000000000000001,
'xtick.direction': 'out', 'axes.facecolor': 'w', 'mathtext.fontset': 'cm',
'ytick.direction': 'out', 'svg.image_inline': True, 'lines.markersize': 10.0,
'figure.dpi': 80, 'text.usetex': True, 'text.fontangle': 'normal',
'patch.edgecolor': 'k', 'legend.labelspacing': 0.5, 'ps.useafm': False,
'mathtext.bf': 'serif:bold', 'lines.solid_joinstyle': 'round',
'font.monospace': ['Bitstream Vera Sans Mono', 'DejaVu Sans Mono', 'Andale
Mono', 'Nimbus Mono L', 'Courier New', 'Courier', 'Fixed', 'Terminal',
'monospace'], 'xtick.minor.size': 2, 'axes.formatter.limits': [-7, 7],
'figure.subplot.wspace': 0.20000000000000001, 'savefig.edgecolor': 'w',
'text.fontvariant': 'normal', 'image.cmap': 'jet', 'axes.edgecolor': 'k',
'tk.window_focus': False, 'image.origin': 'upper', 'text.fontsize': 'medium',
'font.serif': ['Bitstream Vera Serif', 'DejaVu Serif', 'New Century
Schoolbook', 'Century Schoolbook L', 'Utopia', 'ITC Bookman', 'Bookman',
'Nimbus Roman No9 L', 'Times New Roman', 'Times', 'Palatino', 'Charter',
'serif'], 'savefig.facecolor': 'w', 'maskedarray': 'obsolete',
'ytick.minor.size': 2, 'numerix': 'obsolete', 'font.stretch': 'normal',
'text.dvipnghack': None, 'ytick.color': 'k', 'lines.linestyle': '-',
'xtick.color': 'k', 'xtick.major.pad': 4, 'text.fontweight': 'normal',
'patch.facecolor': 'b', 'figure.figsize': [8.0, 6.0], 'axes.linewidth': 1.0,
'legend.handletextpad': 0.80000000000000004, 'mathtext.fallback_to_cm': True,
'lines.linewidth': 1.0, 'savefig.dpi': 100, 'verbose.fileo': 'sys.stdout',
'svg.image_noscale': False, 'docstring.hardcopy': False, 'font.size': 24.0,
'ps.fonttype': 3, 'path.simplify': True, 'polaraxes.grid': True, 'toolbar':
'toolbar2', 'pdf.compression': 6, 'grid.linewidth': 0.5, 'figure.autolayout':
False, 'figure.facecolor': '0.75', 'ps.usedistiller': False, 'legend.isaxes':
True, 'figure.edgecolor': 'w', 'mathtext.tt': 'monospace',
'contour.negative_linestyle': 'dashed', 'image.interpolation': 'bilinear',
'lines.markeredgewidth': 1.5, 'axes3d.grid': True, 'lines.marker': 'None',
'legend.shadow': False, 'axes.titlesize': 24.0, 'backend': 'TkAgg',
'xtick.major.size': 4, 'legend.fontsize': 24.0, 'lines.solid_capstyle':
'projecting', 'mathtext.it': 'serif:italic', 'font.variant': 'normal',
'xtick.labelsize': 'medium', 'axes.unicode_minus': True, 'ps.distiller.res':
6000, 'pdf.fonttype': 3, 'patch.linewidth': 1.0, 'pdf.inheritcolor': False,
'lines.dash_capstyle': 'butt', 'lines.color': 'b', 'text.latex.preview':
False, 'figure.subplot.top': 0.90000000000000002, 'pdf.use14corefonts': False,
'legend.markerscale': 1.0, 'patch.antialiased': True, 'font.style': 'normal',
'backend_fallback': True, 'legend.fancybox': True, 'grid.linestyle': ':',
'axes.labelcolor': 'k', 'text.color': 'k', 'mathtext.rm': 'serif',
'legend.loc': 'upper right', 'interactive': False, 'cairo.format': 'png',
'savefig.orientation': 'portrait', 'axes.axisbelow': False, 'ytick.major.size':
4, 'axes.grid': False, 'plugins.directory': '.matplotlib_plugins',
'grid.color': 'k', 'timezone': 'UTC', 'ytick.major.pad': 4,
'legend.borderpad': 0.40000000000000002, 'lines.dash_joinstyle': 'round',
'datapath': '/usr/share/matplotlib/mpl-data', 'lines.antialiased': True,
'text.latex.unicode': False, 'image.lut': 256, 'units': False,
'figure.subplot.bottom': 0.10000000000000001, 'text.latex.preamble': [''],
'legend.numpoints': 2, 'legend.handlelength': 2.0, 'font.sans-serif':
['Arial'], 'font.family': 'sans-serif', 'axes.labelsize': 24.0,
'ytick.minor.pad': 4, 'legend.borderaxespad': 0.5, 'mathtext.sf': 'sans\\-
serif', 'axes.hold': True, 'verbose.level': 'silent', 'mathtext.default':
'it', 'figure.subplot.left': 0.125, 'legend.columnspacing': 2.0,
'text.fontstyle': 'normal', 'font.weight': 'normal', 'image.resample': False,
'agg.path.chunksize': 0, 'path.simplify_threshold': 0.1111111111111111,
'ytick.labelsize': 'medium', 'ps.papersize': 'letter', 'svg.embed_char_paths':
True}

(sorry for the long post).
Anything obvious that i am doing wrong? I am using:
Python 2.6.6
mpl.__version__ = 0.99.3

thanks
matt

On Thursday, April 07, 2011, Paul Ivanov wrote:

Matt Funk, on 2011-04-07 16:52, wrote:

Hi,
i am farily new to matplotlib so my question might be fairly basic. I
would like to be able to set certain default values at the beginning of
my script. The way i did this with the other values is via changing the
value stored in rcparams. So something like:
import matplotlib.pyplot as mpl
mpl.rcParams['lines.markersize'] = 20

But i would like to set the markerfacecolor in such a way but it is not
included in rcParams. I would really like to avoid setting it in each
individual plot call.

Is there a way to change the default at the start of the script?

Hi Matt,

this depends on how you're plotting.

If you're just using plt.plot - it defers to cycling through the
rcParams['axes.color_cycle'] - so just set that to one value
before starting your plots..

old_color_cycle = rcParams['axes.color_cycle']
rcParams['axes.color_cycle'] = 'purple' # cue Gogol Bordello
plt.figure()
ax = plt.subplot(111)

ax.plot(range(10),'o', markersize=40)
ax.plot(np.random.rand(10),'o', markersize=40)
ax.plot(np.random.rand(10)*10,'o', markersize=40)

# restore color_cycle just for this axes
ax._get_lines.set_color_cycle(old_color_cycle)
ax.plot(range(20,30), range(10),'o', markersize=40)
ax.plot(range(20,30), np.random.rand(10),'o', markersize=40)
ax.plot(range(20,30), np.random.rand(10)*10,'o', markersize=40)

# restore old cycle for all new axes
rcParams['axes.color_cycle'] = old_color_cycle
--

If, on the other hand, you're using scatter, there isn't
currently a way of doing the same, since scatter just uses 'b' as
the default parameter for color.

This should probably be changed to act the same way plot does,
but that isn't currently implemented. This would be a good first
patch for a newcomer -- and would make matplotlib more consistent.

best,

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Hi Matt,

Matt Funk, on 2011-04-08 14:56, wrote:

mpl.__version__ = 0.99.3

ah - this would do it - that axis parameter was added by Eric
Firing on 2010-01-03 - but it didn't go into the 0.99 series - it
went straight to trunk - so you'll have to get at least
matplotlib 1.0 to gain that functionality.

best,

···

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