使用范围的 Numpy MemoryError

Question

I am using numpy method arange, to create time axis with this parameters

import numpy as np
signal =np.ones(626650)
myInterval = 1/125000
t = np.arange(start=0,stop=analogERRN.size-1,step =myInterval, dtype=float)

but I am getting an error saying

a = np.arange(start=0,stop=analogERRN.size-1,step = 1/125000, dtype=float)
Traceback (most recent call last):
  File "C:\LocalData\WPy64-3810\python-3.8.1.amd64\lib\site-packages\IPython\core\interactiveshell.py", line 3319, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-7-fc1514d66d28>", line 1, in <module>
    a = np.arange(start=0,stop=analogERRN.size-1,step = 1/125000, dtype=float)
MemoryError

Why is this happening? Can I make use of linespace instead?

Thanks

Answer 1

我找到了一个使用linspace函数的解决方案，方法是创建一个等距轴，然后除以 myInterval 的倒数（实际上是采样频率）

t = np.linspace(0,len(signal ),len(signal ))/(1/myInterval )