python：将numpy array中的NaN替换为某个数值
import numpy as npa = np.array([[0.5,np.nan,2.5],[-0.5,0.5,1.5],[-1.5,-0.5,0.5],[-3,-2,-1]])print(np.isnan(a))a[np.isnan(a)] = 1.5print(a)
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import numpy as np
a = np.array([[0.5,np.nan,2.5],[-0.5,0.5,1.5],[-1.5,-0.5,0.5],[-3,-2,-1]])
print(np.isnan(a))
a[np.isnan(a)] = 1.5
print(a)
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