.. _axes_grid-demo_floating_axis: axes_grid example code: demo_floating_axis.py ============================================= .. plot:: /home/tcaswell/other_source/matplotlib/doc/mpl_examples/axes_grid/demo_floating_axis.py :: """ An experimental support for curvilinear grid. """ def curvelinear_test2(fig): """ polar projection, but in a rectangular box. """ global ax1 import numpy as np import mpl_toolkits.axisartist.angle_helper as angle_helper from matplotlib.projections import PolarAxes from matplotlib.transforms import Affine2D from mpl_toolkits.axisartist import SubplotHost from mpl_toolkits.axisartist import GridHelperCurveLinear # see demo_curvelinear_grid.py for details tr = Affine2D().scale(np.pi/180., 1.) + PolarAxes.PolarTransform() extreme_finder = angle_helper.ExtremeFinderCycle(20, 20, lon_cycle = 360, lat_cycle = None, lon_minmax = None, lat_minmax = (0, np.inf), ) grid_locator1 = angle_helper.LocatorDMS(12) tick_formatter1 = angle_helper.FormatterDMS() grid_helper = GridHelperCurveLinear(tr, extreme_finder=extreme_finder, grid_locator1=grid_locator1, tick_formatter1=tick_formatter1 ) ax1 = SubplotHost(fig, 1, 1, 1, grid_helper=grid_helper) fig.add_subplot(ax1) # Now creates floating axis #grid_helper = ax1.get_grid_helper() # floating axis whose first coordinate (theta) is fixed at 60 ax1.axis["lat"] = axis = ax1.new_floating_axis(0, 60) axis.label.set_text(r"$\theta = 60^{\circ}$") axis.label.set_visible(True) # floating axis whose second coordinate (r) is fixed at 6 ax1.axis["lon"] = axis = ax1.new_floating_axis(1, 6) axis.label.set_text(r"$r = 6$") ax1.set_aspect(1.) ax1.set_xlim(-5, 12) ax1.set_ylim(-5, 10) ax1.grid(True) import matplotlib.pyplot as plt fig = plt.figure(1, figsize=(5, 5)) fig.clf() curvelinear_test2(fig) plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)