Причиной возникновения ошибки TypeError при нанесении зубцов ветра на Metpy SkewT - PullRequest
0 голосов
/ 06 ноября 2019

Metpy.plots.skewT.plot_barbs выдает эту ошибку:

TypeError: ufunc 'isfinite' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

при получении 3 массивов Numpy: pressure, u и v.

Другие пользователи, которые сообщили об этой ошибкесообщение либо не использовало правильный dtype, либо использовало np в качестве имени переменной. Я убедился, что ни один из них не является причиной в моем случае. Я также попытался удалить единицы из массивов u и v.

import numpy as np
import metpy.plots as mpplots

# units comes from another file

pres = np.array([nan, 96950.26215278, 96877.55755208, 96763.37230603, 96652.54882812]) * units.pascal
u = np.array([nan,  0.36735288,  0.44829027,  1.29182593, -0.94374102]) * units.meter / units.second
v = np.array([nan, 4.61110612, 5.74110696, 6.01459714, 5.5652721]) * units.meter / units.second

rotation = 30
fig = mpplots.SkewT(rotation=rotation, aspect=80.5)
fig.ax.yaxis.set_major_locator(ticker.MultipleLocator(5))
fig.plot(pres, temp, 'r', label="Temperature")
fig.plot(pres, t_d, 'g', label="Dewpoint")
fig.ax.set_ylim(np.nanmax(pres.to(units.hPa).magnitude) + 10,
                np.nanmin(pres.to(units.hPa).magnitude) - 20)
fig.ax.set_xlim(np.nanmin(t_d.to(units.degC).magnitude) - 5,
                np.nanmax(temp.to(units.degC).magnitude) + 10)
fig.plot_dry_adiabats(linewidth=0.5, label="Dry Adiabats")
fig.plot_moist_adiabats(linewidth=0.5, label="Moist Adiabats")
fig.plot_mixing_lines(linewidth=0.5, label="Mixing Ratio")
fig.plot_barbs(np.array(pres.magnitude, dtype='float64') * pres.units,
               np.array(u.magnitude, dtype='float64') * u.units,
               np.array(v.magnitude, dtype='float64') * v.units)
Traceback (most recent call last):
  File "/snap/pycharm-professional/167/helpers/pydev/pydevd.py", line 1415, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "/snap/pycharm-professional/167/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "/home/.../sample_analysis.py", line 43, in <module>
    fig = plotting.plot_skewT(temp=temp, pres=pres, t_d=t_d, u=u, v=v, units=units)
  File "/home/.../plotting.py", line 248, in plot_skewT
    np.array(v.magnitude, dtype='float64') * v.units)
  File "/home/.../miniconda3/envs/Profiles/lib/python3.7/site-packages/metpy/plots/skewt.py", line 440, in plot_barbs
    clip_on=True, zorder=2, **kwargs)
  File "/home/.../miniconda3/envs/Profiles/lib/python3.7/site-packages/matplotlib/__init__.py", line 1785, in inner
    return func(ax, *args, **kwargs)
  File "/home/.../miniconda3/envs/Profiles/lib/python3.7/site-packages/matplotlib/axes/_axes.py", line 4874, in barbs
    b = mquiver.Barbs(self, *args, **kw)
  File "/home/.../miniconda3/envs/Profiles/lib/python3.7/site-packages/matplotlib/quiver.py", line 965, in __init__
    self.set_UVC(u, v, c)
  File "/home/.../miniconda3/envs/Profiles/lib/python3.7/site-packages/matplotlib/quiver.py", line 1145, in set_UVC
    self.u = ma.masked_invalid(U, copy=False).ravel()
  File "/home/.../miniconda3/envs/Profiles/lib/python3.7/site-packages/numpy/ma/core.py", line 2366, in masked_invalid
    condition = ~(np.isfinite(a))
TypeError: ufunc 'isfinite' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

Process finished with exit code 1
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