关于#python#，matlab nan的问题，如何解决？

Question

python调用matlab文件的过程中，matlab文件返回了一个一维数组，但是在python中输出却是全为nan
python调用文件如下

from __future__ import print_function
import Detal_R2
import matlab
import matplotlib.pyplot as plt
import numpy as np

my_Detal_R2 = Detal_R2.initialize()

waveIn = matlab.double([0.000004], size=(1, 1))
IIn = matlab.double([1.35 * 10 ^ 18], size=(1, 1))
detal_ROut = my_Detal_R2.detal_R2(waveIn, IIn)
y = np.array(detal_ROut)
x = np.linspace(0, 20 * 10 ^ -12, 300)
plt.plot(x, y)
plt.show()

my_Detal_R2.terminate()

python在cmd中输出如下：

[[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],
[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[
nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[n
an],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[na
n],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan
],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan]
,[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],
[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[
nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan],[nan]]

Answer 1

在Python中输出的结果显示全部为NaN，这可能是因为在MATLAB中返回的double数组中的元素被自动转换为NaN，这可能是由于MATLAB中的NaN和Python中的NaN之间的差异引起的。您可以在Python中通过检查每个元素来确认是否是NaN，这可以通过使用numpy库中的numpy.isnan()函数来完成。

import numpy as np
...
y = np.array(detal_ROut)
print(np.isnan(y).any()) # Check if any element in y is NaN

如果结果为True，则意味着y中至少有一个元素是NaN，否则为False。如果结果为True，则可以尝试在MATLAB中进行调试，以查看生成的数组中的元素是否正确。