def set_vertices(self, **vertex_options):
"""
Sets the vertex plotting parameters for this GraphPlot. This function
is called by the constructor but can also be called to make updates to
the vertex options of an existing GraphPlot object. Note that the
changes are cumulative.
EXAMPLES::
sage: g = Graph({}, loops=True, multiedges=True, sparse=True)
sage: g.add_edges([(0,0,'a'),(0,0,'b'),(0,1,'c'),(0,1,'d'),
... (0,1,'e'),(0,1,'f'),(0,1,'f'),(2,1,'g'),(2,2,'h')])
sage: GP = g.graphplot(vertex_size=100, edge_labels=True, color_by_label=True, edge_style='dashed')
sage: GP.set_vertices(talk=True)
sage: GP.plot()
sage: GP.set_vertices(vertex_colors='pink', vertex_shape='^')
sage: GP.plot()
"""
# Handle base vertex options
voptions = {}
for arg in vertex_options:
self._options[arg] = vertex_options[arg]
# First set defaults for styles
vertex_colors = None
if self._options['talk']:
voptions['markersize'] = 500
if self._options['partition'] is None:
vertex_colors = '#ffffff'
else:
voptions['markersize'] = self._options['vertex_size']
if 'vertex_colors' not in self._options or self._options['vertex_colors'] is None:
if self._options['partition'] is not None:
from sage.plot.colors import rainbow,rgbcolor
partition = self._options['partition']
l = len(partition)
R = rainbow(l)
vertex_colors = {}
for i in range(l):
vertex_colors[R[i]] = partition[i]
elif len(self._graph._boundary) != 0:
vertex_colors = {}
bdy_verts = []
int_verts = []
for v in self._graph.vertex_iterator():
if v in self._graph._boundary:
bdy_verts.append(v)
else:
int_verts.append(v)
vertex_colors['#fec7b8'] = int_verts
vertex_colors['#b3e8ff'] = bdy_verts
elif not vertex_colors:
vertex_colors='#fec7b8'
else:
vertex_colors = self._options['vertex_colors']
if 'vertex_shape' in self._options:
voptions['marker'] = self._options['vertex_shape']
if self._graph.is_directed():
self._vertex_radius = sqrt(voptions['markersize']/pi)
self._arrowshorten = 2*self._vertex_radius
if self._arcdigraph:
self._vertex_radius = sqrt(voptions['markersize']/(20500*pi))
voptions['zorder'] = 7
if not isinstance(vertex_colors, dict):
voptions['facecolor'] = vertex_colors
if self._arcdigraph:
self._plot_components['vertices'] = [circle(center,
self._vertex_radius, fill=True, facecolor=vertex_colors, clip=False)
for center in self._pos.values()]
else:
self._plot_components['vertices'] = scatter_plot(
self._pos.values(), clip=False, **voptions)
else:
# Color list must be ordered:
pos = []
colors = []
for i in vertex_colors:
pos += [self._pos[j] for j in vertex_colors[i]]
colors += [i]*len(vertex_colors[i])
# If all the vertices have not been assigned a color
if len(self._pos)!=len(pos):
from sage.plot.colors import rainbow,rgbcolor
vertex_colors_rgb=[rgbcolor(c) for c in vertex_colors]
for c in rainbow(len(vertex_colors)+1):
if rgbcolor(c) not in vertex_colors_rgb:
break
leftovers=[j for j in self._pos.values() if j not in pos]
pos+=leftovers
colors+=[c]*len(leftovers)
if self._arcdigraph:
self._plot_components['vertices'] = [circle(pos[i],
self._vertex_radius, fill=True, facecolor=colors[i], clip=False)
for i in range(len(pos))]
else:
self._plot_components['vertices'] = scatter_plot(pos,
facecolor=colors, clip=False, **voptions)
if self._options['vertex_labels']:
self._plot_components['vertex_labels'] = []
# TODO: allow text options
for v in self._nodelist:
self._plot_components['vertex_labels'].append(text(str(v),
self._pos[v], rgbcolor=(0,0,0), zorder=8))
def set_vertices(self, **vertex_options):
"""
Sets the vertex plotting parameters for this GraphPlot. This function
is called by the constructor but can also be called to make updates to
the vertex options of an existing GraphPlot object. Note that the
changes are cumulative.
EXAMPLES::
sage: g = Graph({}, loops=True, multiedges=True, sparse=True)
sage: g.add_edges([(0,0,'a'),(0,0,'b'),(0,1,'c'),(0,1,'d'),
... (0,1,'e'),(0,1,'f'),(0,1,'f'),(2,1,'g'),(2,2,'h')])
sage: GP = g.graphplot(vertex_size=100, edge_labels=True, color_by_label=True, edge_style='dashed')
sage: GP.set_vertices(talk=True)
sage: GP.plot()
sage: GP.set_vertices(vertex_colors='pink', vertex_shape='^')
sage: GP.plot()
"""
# Handle base vertex options
voptions = {}
for arg in vertex_options:
self._options[arg] = vertex_options[arg]
# First set defaults for styles
vertex_colors = None
if self._options['talk']:
voptions['markersize'] = 500
if self._options['partition'] is None:
vertex_colors = '#ffffff'
else:
voptions['markersize'] = self._options['vertex_size']
if 'vertex_colors' not in self._options:
if self._options['partition'] is not None:
from sage.plot.colors import rainbow, rgbcolor
partition = self._options['partition']
l = len(partition)
R = rainbow(l)
vertex_colors = {}
for i in range(l):
vertex_colors[R[i]] = partition[i]
elif len(self._graph._boundary) != 0:
vertex_colors = {}
bdy_verts = []
int_verts = []
for v in self._graph.vertex_iterator():
if v in self._graph._boundary:
bdy_verts.append(v)
else:
int_verts.append(v)
vertex_colors['#fec7b8'] = int_verts
vertex_colors['#b3e8ff'] = bdy_verts
elif not vertex_colors:
vertex_colors = '#fec7b8'
else:
vertex_colors = self._options['vertex_colors']
if 'vertex_shape' in self._options:
voptions['marker'] = self._options['vertex_shape']
if self._graph.is_directed():
self._vertex_radius = sqrt(voptions['markersize'] / pi)
self._arrowshorten = 2 * self._vertex_radius
if self._arcdigraph:
self._vertex_radius = sqrt(voptions['markersize'] /
(20500 * pi))
voptions['zorder'] = 7
if not isinstance(vertex_colors, dict):
voptions['facecolor'] = vertex_colors
if self._arcdigraph:
self._plot_components['vertices'] = [
circle(center,
self._vertex_radius,
fill=True,
facecolor=vertex_colors,
clip=False) for center in self._pos.values()
]
else:
self._plot_components['vertices'] = scatter_plot(
self._pos.values(), clip=False, **voptions)
else:
# Color list must be ordered:
pos = []
colors = []
for i in vertex_colors:
pos += [self._pos[j] for j in vertex_colors[i]]
colors += [i] * len(vertex_colors[i])
# If all the vertices have not been assigned a color
if len(self._pos) != len(pos):
from sage.plot.colors import rainbow, rgbcolor
vertex_colors_rgb = [rgbcolor(c) for c in vertex_colors]
for c in rainbow(len(vertex_colors) + 1):
if rgbcolor(c) not in vertex_colors_rgb:
break
leftovers = [j for j in self._pos.values() if j not in pos]
pos += leftovers
colors += [c] * len(leftovers)
if self._arcdigraph:
self._plot_components['vertices'] = [
circle(pos[i],
self._vertex_radius,
fill=True,
facecolor=colors[i],
clip=False) for i in range(len(pos))
]
else:
self._plot_components['vertices'] = scatter_plot(
pos, facecolor=colors, clip=False, **voptions)
if self._options['vertex_labels']:
self._plot_components['vertex_labels'] = []
# TODO: allow text options
for v in self._nodelist:
self._plot_components['vertex_labels'].append(
text(str(v), self._pos[v], rgbcolor=(0, 0, 0), zorder=8))