无论我似乎做了什么,或者我过去常常查到哪些问题 - 我似乎都无法改变刻度标签的简单属性。
此代码:
from mpl_toolkits.axes_grid.axislines import SubplotZero
from matplotlib.transforms import BlendedGenericTransform
import matplotlib.pyplot as plt
import numpy
if 1:
fig = plt.figure(1)
ax = SubplotZero(fig, 111)
fig.add_subplot(ax)
# thicken the axis lines
ax.axhline(linewidth=1.7, color="k")
ax.axvline(linewidth=1.7, color="k")
plt.xticks([-numpy.pi/2, -numpy.pi/4, 0, numpy.pi/4, numpy.pi/2], [r'$-\pi$', r'$-\pi/2$', r'$O$', r'$\pi/2$', r'$\pi$'], rotation=30)
plt.yticks([])
#ax.set_xticklabels([r'$-\pi$', r'$-\pi/2$', r'$0$', r'$\pi/2$', r'$\pi$'], rotation=40, ha='left')
# end-of-axis arrows
ax.text(0, 1.05, r'$y$', transform=BlendedGenericTransform(ax.transData, ax.transAxes), ha='center')
ax.text(1.03, 0, r'$x$', transform=BlendedGenericTransform(ax.transAxes, ax.transData), va='center')
plt.ylim(-5, 5)
plt.xlim(-numpy.pi/2, numpy.pi/2)
x_width = (abs(plt.xlim()[0]) + abs(plt.xlim()[1])) / 2
y_width = (abs(plt.ylim()[0]) + abs(plt.ylim()[1])) / 2
# end-of-axis arrows
plt.arrow(plt.xlim()[1], -0.003, x_width*0.01, 0,
width=x_width*0.0015, color="k", clip_on=False,
head_width=y_width*0.24/7, head_length=x_width*0.024)
plt.arrow(0.003, plt.ylim()[1], 0, y_width*0.01,
width=y_width*0.0015, color="k", clip_on=False,
head_width=x_width*0.24/7, head_length=y_width*0.024)
for direction in ["xzero", "yzero"]:
ax.axis[direction].set_visible(True)
for direction in ["left", "right", "bottom", "top"]:
ax.axis[direction].set_visible(False)
x = numpy.linspace(-numpy.pi/2, numpy.pi/2, 2500)
yy = numpy.tan(2*(x - numpy.pi/2))
threshold = 1000
yy[yy > threshold] = numpy.inf
yy[yy < -threshold] = numpy.inf
ax.plot(x, yy, linewidth=1.2, color="black")
ax.axvline(x=-3*numpy.pi/4, linewidth=1.0, color="k", linestyle="--")
ax.axvline(x=-numpy.pi/4, linewidth=1.0, color="k", linestyle="--")
ax.axvline(x=numpy.pi/4, linewidth=1.0, color="k", linestyle="--")
ax.axvline(x=3*numpy.pi/4, linewidth=1.0, color="k", linestyle="--")
plt.savefig('MC6.png')
特别注意这一行:
plt.xticks([-numpy.pi/2, -numpy.pi/4, 0, numpy.pi/4, numpy.pi/2], [r'$-\pi$', r'$-\pi/2$', r'$O$', r'$\pi/2$', r'$\pi$'], rotation=30)
不将标签旋转30度。同样,如果我做其他变通方法来改变字体大小,标签总是保持不变。
我是否遗漏了一些关于matplotlib的简单内容???
答案 0 :(得分:3)
添加以下行:
ax.axis["xzero"].major_ticklabels.set_rotation(30)
作为参考,这是一个邮件列表项,其中包含:http://matplotlib.1069221.n5.nabble.com/rotating-x-tick-labels-bold-labels-with-axislines-toolkit-td7661.html
至于为什么你做的事没有效果,我只能猜测。一个疯狂的猜测是状态机(当你从pyplot命名空间调用函数时它在引擎盖下工作)假定plt.xticks
与底部脊椎相关,你明确地设置为不可见。