4 examples of 'matplotlib colorbar title' in Python

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893def ax_colorbar(vmin, vmax, ax=None, label=None, ticks=None):
894 """Draw a color bar
895
896 Draws a color bar on an existing axes. The range of the colors is
897 defined by ``vmin`` and ``vmax``.
898
899 .. note::
900
901 Unlike the colorbar method from matplotlib, this method does not
902 automatically create a new axis for the colorbar. It will paint
903 in the currently active axis instead, overwriting any existing
904 plots in that axis. Make sure to create a new axis for the
905 colorbar.
906
907 Parameters
908 ----------
909 vmin, vmax : float
910 The minimum and maximum values for the colorbar.
911 ax : Axes, optional
912 The axes to draw the scalp plot on. If not provided, the
913 currently activated axes (i.e. ``gca()``) will be taken
914 label : string, optional
915 The label for the colorbar
916 ticks : list, optional
917 The tick positions
918
919 Returns
920 -------
921 ax : Axes
922 the axes on which the plot was drawn
923 """
924 if ax is None:
925 ax = plt.gca()
926 ColorbarBase(ax, norm=Normalize(vmin, vmax), label=label, ticks=ticks)
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147def plot_topo_colorbar(vmin, vmax, label):
148 """Helper function to create colorbars for the topography plots."""
149
150 fig = plt.figure(figsize=(2, 3))
151 ax1 = fig.add_axes([0.9, 0.25, 0.15, 0.9])
152
153 cmap = cm.viridis
154 norm = colors.Normalize(vmin=vmin, vmax=vmax)
155
156 cb1 = colorbar.ColorbarBase(plt.gca(), cmap=cmap,
157 norm=norm, orientation='vertical')
109def colorbar(mappable):
110 ax = mappable.axes
111 fig = ax.figure
112 divider = make_axes_locatable(ax)
113 cax = divider.append_axes('right', size='5%', pad=0.05)
114 return fig.colorbar(mappable, cax=cax)
2220def _colorbar(off=0.0, colors=256, label_name='zlabel'):
2221 global _plt
2222 gr.savestate()
2223 viewport = _plt.kwargs['viewport']
2224 zmin, zmax = _plt.kwargs['zrange']
2225 gr.setwindow(0, 1, zmin, zmax)
2226 gr.setviewport(viewport[1] + 0.02 + off, viewport[1] + 0.05 + off,
2227 viewport[2], viewport[3])
2228
2229 if colors == 1:
2230 data = [1000]
2231 else:
2232 data = [1000 + int(255 * i / (colors - 1)) for i in range(colors)]
2233
2234 gr.setlinecolorind(1)
2235 gr.setscale(0)
2236 if _plt.kwargs['scale'] & gr.OPTION_FLIP_Z:
2237 gr.cellarray(0, 1, zmin, zmax, 1, colors, data)
2238 else:
2239 gr.cellarray(0, 1, zmax, zmin, 1, colors, data)
2240 diag = ((viewport[1] - viewport[0])**2 + (viewport[3] - viewport[2])**2)**0.5
2241 charheight = max(0.016 * diag, 0.012)
2242 gr.setcharheight(charheight)
2243 if _plt.kwargs['scale'] & gr.OPTION_Z_LOG:
2244 if _plt.kwargs['scale'] & gr.OPTION_FLIP_Z:
2245 gr.setscale(gr.OPTION_Y_LOG | gr.OPTION_FLIP_Y)
2246 else:
2247 gr.setscale(gr.OPTION_Y_LOG)
2248 gr.axes(0, 2, 1, zmin, 0, 1, 0.005)
2249 else:
2250 if _plt.kwargs['scale'] & gr.OPTION_FLIP_Z:
2251 gr.setscale(gr.OPTION_FLIP_Y)
2252 else:
2253 gr.setscale(0)
2254 ztick = 0.5 * gr.tick(zmin, zmax)
2255 gr.axes(0, ztick, 1, zmin, 0, 1, 0.005)
2256 label = _plt.kwargs.get(label_name, None)
2257 if label:
2258 diag = ((viewport[1] - viewport[0])**2 + (viewport[3] - viewport[2])**2)**0.5
2259 charheight = max(0.018 * diag, 0.012)
2260 gr.setcharheight(charheight)
2261 gr.settextalign(gr.TEXT_HALIGN_CENTER, gr.TEXT_VALIGN_BASE)
2262 gr.textext(viewport[1] + 0.035 + off, viewport[3] + 0.01, label)
2263 gr.restorestate()

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