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Add example code for current logo
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‎examples/misc/logos2.py

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"""
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================
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Matplotlib Logos
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================
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===============
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Matplotlib logo
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===============
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Displays some matplotlib logos.
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This example generates the current matplotlib logo.
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Thanks to Tony Yu <[email protected]> for the logo design
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Thanks to Tony Yu <[email protected]> for the original logo design.
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"""
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import numpy as np
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import matplotlib as mpl
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import matplotlib.pyplot as plt
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import matplotlib.cm as cm
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mpl.rcParams['xtick.labelsize'] = 10
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mpl.rcParams['ytick.labelsize'] = 12
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mpl.rcParams['axes.edgecolor'] = 'gray'
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axalpha = 0.05
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figcolor = 'white'
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dpi = 80
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fig = plt.figure(figsize=(6, 1.1), dpi=dpi)
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fig.patch.set_edgecolor(figcolor)
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fig.patch.set_facecolor(figcolor)
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def add_math_background():
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ax = fig.add_axes([0., 0., 1., 1.])
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text = []
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text.append(
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(r"$W^{3\beta}_{\delta_1 \rho_1 \sigma_2} = "
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r"U^{3\beta}_{\delta_1 \rho_1} + \frac{1}{8 \pi 2}"
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r"\int^{\alpha_2}_{\alpha_2} d \alpha^\prime_2 "
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r"\left[\frac{ U^{2\beta}_{\delta_1 \rho_1} - "
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r"\alpha^\prime_2U^{1\beta}_{\rho_1 \sigma_2} "
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r"}{U^{0\beta}_{\rho_1 \sigma_2}}\right]$", (0.7, 0.2), 20))
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text.append((r"$\frac{d\rho}{d t} + \rho \vec{v}\cdot\nabla\vec{v} "
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r"= -\nabla p + \mu\nabla^2 \vec{v} + \rho \vec{g}$",
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(0.35, 0.9), 20))
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text.append((r"$\int_{-\infty}^\infty e^{-x^2}dx=\sqrt{\pi}$",
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(0.15, 0.3), 25))
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text.append((r"$F_G = G\frac{m_1m_2}{r^2}$",
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(0.85, 0.7), 30))
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for eq, (x, y), size in text:
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ax.text(x, y, eq, ha='center', va='center', color="#11557c",
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alpha=0.25, transform=ax.transAxes, fontsize=size)
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import matplotlib.font_manager
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from matplotlib.patches import Circle, Rectangle, PathPatch
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from matplotlib.textpath import TextPath
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import matplotlib.transforms as mtrans
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MPL_BLUE = '#11557c'
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def get_font_properties():
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# The original font is Calibri, if that is not installed, we fall back
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# to Carlito, which is metrically equivalent.
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if 'Calibri' in matplotlib.font_manager.findfont('Calibri:bold'):
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return matplotlib.font_manager.FontProperties(family='Calibri',
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weight='bold')
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if 'Carlito' in matplotlib.font_manager.findfont('Carlito:bold'):
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print('Original font not found. Falling back to Carlito. '
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'The logo text will not be in the correct font.')
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return matplotlib.font_manager.FontProperties(family='Carlito',
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weight='bold')
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print('Original font not found. '
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'The logo text will not be in the correct font.')
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return None
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def create_icon_axes(fig, ax_position, lw_bars, lw_grid, lw_border, rgrid):
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"""
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Create a polar axes containing the matplotlib radar plot.
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Parameters
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----------
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fig : matplotlib.figure.Figure
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The figure to draw into.
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ax_position : (float, float, float, float)
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The position of the created Axes in figure coordinates as
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(x, y, width, height).
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lw_bars : float
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The linewidth of the bars.
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lw_grid : float
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The linewidth of the grid.
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lw_border : float
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The linewidth of the Axes border.
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rgrid : array-like
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Positions of the radial grid.
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Returns
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-------
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ax : matplotlib.axes.Axes
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The created Axes.
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"""
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with plt.rc_context({'axes.edgecolor': MPL_BLUE,
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'axes.linewidth': lw_border}):
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ax = fig.add_axes(ax_position, projection='polar')
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ax.set_axisbelow(True)
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N = 7
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arc = 2. * np.pi
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theta = np.arange(0.0, arc, arc / N)
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radii = np.array([2, 6, 8, 7, 4, 5, 8])
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width = np.pi / 4 * np.array([0.4, 0.4, 0.6, 0.8, 0.2, 0.5, 0.3])
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bars = ax.bar(theta, radii, width=width, bottom=0.0, align='edge',
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edgecolor='0.3', lw=lw_bars)
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for r, bar in zip(radii, bars):
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color = *cm.jet(r / 10.)[:3], 0.6 # color from jet with alpha=0.6
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bar.set_facecolor(color)
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ax.tick_params(labelbottom=False, labeltop=False,
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labelleft=False, labelright=False)
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ax.grid(lw=lw_grid, color='0.9')
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ax.set_rmax(9)
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ax.set_yticks(rgrid)
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# the actual visible background - extends a bit beyond the axis
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ax.add_patch(Rectangle((0, 0), arc, 9.58,
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facecolor='white', zorder=0,
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clip_on=False, in_layout=False))
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return ax
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def create_text_axes(fig, height_px):
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"""Create an axes in *fig* that contains 'matplotlib' as Text."""
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ax = fig.add_axes((0, 0, 1, 1))
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ax.set_aspect("equal")
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ax.set_axis_off()
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return ax
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def add_matplotlib_text(ax):
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ax.text(0.95, 0.5, 'matplotlib', color='#11557c', fontsize=65,
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ha='right', va='center', alpha=1.0, transform=ax.transAxes)
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def add_polar_bar():
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ax = fig.add_axes([0.025, 0.075, 0.2, 0.85], projection='polar')
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ax.patch.set_alpha(axalpha)
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ax.set_axisbelow(True)
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N = 7
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arc = 2. * np.pi
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theta = np.arange(0.0, arc, arc/N)
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radii = 10 * np.array([0.2, 0.6, 0.8, 0.7, 0.4, 0.5, 0.8])
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width = np.pi / 4 * np.array([0.4, 0.4, 0.6, 0.8, 0.2, 0.5, 0.3])
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bars = ax.bar(theta, radii, width=width, bottom=0.0)
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for r, bar in zip(radii, bars):
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bar.set_facecolor(cm.jet(r/10.))
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bar.set_alpha(0.6)
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ax.tick_params(labelbottom=False, labeltop=False,
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labelleft=False, labelright=False)
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ax.grid(lw=0.8, alpha=0.9, ls='-', color='0.5')
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ax.set_yticks(np.arange(1, 9, 2))
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ax.set_rmax(9)
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if __name__ == '__main__':
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main_axes = add_math_background()
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add_polar_bar()
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add_matplotlib_text(main_axes)
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plt.show()
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path = TextPath((0, 0), "matplotlib", size=height_px * 0.8,
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prop=get_font_properties())
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angle = 4.25 # degrees
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trans = mtrans.Affine2D().skew_deg(angle, 0)
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patch = PathPatch(path, transform=trans + ax.transData, color=MPL_BLUE,
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lw=0)
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ax.add_patch(patch)
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ax.autoscale()
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def make_logo(height_px, lw_bars, lw_grid, lw_border, rgrid, with_text=False):
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"""
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Create a full figure with the Matplotlib logo.
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Parameters
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----------
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height_px : int
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Height of the figure in pixel.
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lw_bars : float
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The linewidth of the bar border.
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lw_grid : float
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The linewidth of the grid.
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lw_border : float
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The linewidth of icon border.
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rgrid : sequence of float
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The radial grid positions.
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with_text : bool
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Whether to draw only the icon or to include 'matplotlib' as text.
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"""
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dpi = 100
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height = height_px / dpi
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figsize = (5 * height, height) if with_text else (height, height)
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fig = plt.figure(figsize=figsize, dpi=dpi)
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fig.patch.set_alpha(0)
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if with_text:
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create_text_axes(fig, height_px)
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ax_pos = (0.535, 0.12, .17, 0.75) if with_text else (0.03, 0.03, .94, .94)
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ax = create_icon_axes(fig, ax_pos, lw_bars, lw_grid, lw_border, rgrid)
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return fig, ax
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##############################################################################
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# A large logo:
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make_logo(height_px=110, lw_bars=0.7, lw_grid=0.5, lw_border=1,
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rgrid=[1, 3, 5, 7])
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##############################################################################
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# A small 32px logo:
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make_logo(height_px=32, lw_bars=0.3, lw_grid=0.3, lw_border=0.3, rgrid=[5])
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##############################################################################
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# A large logo including text, as used on the matplotlib website.
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make_logo(height_px=110, lw_bars=0.7, lw_grid=0.5, lw_border=1,
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rgrid=[1, 3, 5, 7], with_text=True)

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