Question

我试图使用mpl_toolkits显示声纳项目的雷达可视化。它似乎在我的电脑上正常编译，但当我在我的Pi 3上运行时，我得到了matplotlib窗口，但没有绘制。唯一的错误信息是：

Warning (from warnings module):
  File "/usr/local/lib/python3.4/dist-packages/matplotlib/projections/polar.py", line 157
    theta %= 2 * np.pi
RuntimeWarning: invalid value encountered in remainder

......没有追溯。

据我了解，这表示除以零，但是：

我的电脑上出现了类似的错误，但仍有情节
这并不能解释为什么它可以在一台设备上运行，而不能在另一台设备上运行。

据我所知，在安装python-cairocffi之后，我已经拥有了所有必需的软件包。帮助

更多详情：

PC上的Python3.6，Pi上的Python3.4
Pi 3
Raspbian Jessie

使用的代码：

"""
Axis within rectangular frame
based on demo_curvelinear_grid.py.
"""
import numpy as np
import matplotlib.pyplot as plt
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


def curvelinear_test2(fig):
    """
    polar projection, but in a rectangular box.
    """
    global ax1

    # rotate a bit for better orientation
    tr_rotate = Affine2D().translate(90, 0)

    # see demo_curvelinear_grid.py for details
    tr = tr_rotate + 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

    # floating axis whose first coordinate (theta) is fixed at 0
    ax1.axis["lat"] = axis = ax1.new_floating_axis(0, 0)
    # axis.label.set_text(r"$\theta = 60^{\circ}$")
    axis.major_ticklabels.set_axis_direction("right")
    axis.label.set_visible(True)

    # floating axis whose second coordinate (r) is fixed at 6
    ax1.axis["top"].major_ticklabels.set_visible(True)
    # axis.label.set_text(r"$r = 6$")
    # axis.label.set_visible(True)


    ax1.set_aspect(1.)
    ax1.set_xlim(-15, 15)
    ax1.set_ylim(0, 20)

    ax1.grid(True)

    x = [1,2,3,4,5,6,7,8]
    y = [5,2,4,2,1,4,5,2]

    ax1.plot(x, y)

fig = plt.figure(1, figsize=(5, 5))
fig.clf()
curvelinear_test2(fig)

plt.show()

这是我发布的第一个问题，对于任何格式化/缺少信息错误，我深表歉意。

Raspberry PI和matplotlib / mpl_toolkits：Plot窗口打开，但没有图表可见

0 个答案: