.. _ticks_and_spines-tick-formatters: ticks_and_spines example code: tick-formatters.py ================================================= .. plot:: /home/tcaswell/src/p/matplotlib/doc/mpl_examples/ticks_and_spines/tick-formatters.py :: """ =============== Tick formatters =============== Show the different tick formatters. """ import numpy as np import matplotlib.pyplot as plt import matplotlib.ticker as ticker # Setup a plot such that only the bottom spine is shown def setup(ax): ax.spines['right'].set_color('none') ax.spines['left'].set_color('none') ax.yaxis.set_major_locator(ticker.NullLocator()) ax.spines['top'].set_color('none') ax.xaxis.set_ticks_position('bottom') ax.tick_params(which='major', width=1.00, length=5) ax.tick_params(which='minor', width=0.75, length=2.5, labelsize=10) ax.set_xlim(0, 5) ax.set_ylim(0, 1) ax.patch.set_alpha(0.0) plt.figure(figsize=(8, 5)) n = 6 # Null formatter ax = plt.subplot(n, 1, 1) setup(ax) ax.xaxis.set_major_locator(ticker.MultipleLocator(1.00)) ax.xaxis.set_minor_locator(ticker.MultipleLocator(0.25)) ax.xaxis.set_major_formatter(ticker.NullFormatter()) ax.xaxis.set_minor_formatter(ticker.NullFormatter()) ax.text(0.0, 0.1, "NullFormatter()", fontsize=16, transform=ax.transAxes) # Fixed formatter ax = plt.subplot(n, 1, 2) setup(ax) ax.xaxis.set_major_locator(ticker.MultipleLocator(1.0)) ax.xaxis.set_minor_locator(ticker.MultipleLocator(0.25)) majors = ["", "0", "1", "2", "3", "4", "5"] ax.xaxis.set_major_formatter(ticker.FixedFormatter(majors)) minors = [""] + ["%.2f" % (x-int(x)) if (x-int(x)) else "" for x in np.arange(0, 5, 0.25)] ax.xaxis.set_minor_formatter(ticker.FixedFormatter(minors)) ax.text(0.0, 0.1, "FixedFormatter(['', '0', '1', ...])", fontsize=15, transform=ax.transAxes) # Func formatter def major_formatter(x, pos): return "[%.2f]" % x ax = plt.subplot(n, 1, 3) setup(ax) ax.xaxis.set_major_locator(ticker.MultipleLocator(1.00)) ax.xaxis.set_minor_locator(ticker.MultipleLocator(0.25)) ax.xaxis.set_major_formatter(ticker.FuncFormatter(major_formatter)) ax.text(0.0, 0.1, 'FuncFormatter(lambda x, pos: "[%.2f]" % x)', fontsize=15, transform=ax.transAxes) # FormatStr formatter ax = plt.subplot(n, 1, 4) setup(ax) ax.xaxis.set_major_locator(ticker.MultipleLocator(1.00)) ax.xaxis.set_minor_locator(ticker.MultipleLocator(0.25)) ax.xaxis.set_major_formatter(ticker.FormatStrFormatter(">%d<")) ax.text(0.0, 0.1, "FormatStrFormatter('>%d<')", fontsize=15, transform=ax.transAxes) # Scalar formatter ax = plt.subplot(n, 1, 5) setup(ax) ax.xaxis.set_major_locator(ticker.AutoLocator()) ax.xaxis.set_minor_locator(ticker.AutoMinorLocator()) ax.xaxis.set_major_formatter(ticker.ScalarFormatter(useMathText=True)) ax.text(0.0, 0.1, "ScalarFormatter()", fontsize=15, transform=ax.transAxes) # StrMethod formatter ax = plt.subplot(n, 1, 6) setup(ax) ax.xaxis.set_major_locator(ticker.MultipleLocator(1.00)) ax.xaxis.set_minor_locator(ticker.MultipleLocator(0.25)) ax.xaxis.set_major_formatter(ticker.StrMethodFormatter("{x}")) ax.text(0.0, 0.1, "StrMethodFormatter('{x}')", fontsize=15, transform=ax.transAxes) # Push the top of the top axes outside the figure because we only show the # bottom spine. plt.subplots_adjust(left=0.05, right=0.95, bottom=0.05, top=1.05) plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)