[英]How do I retrieve the columns of a 2D integer NumPy array that have a mean greater than a certain number?
我有：
x = np.array([[1,2],[3,4]])
np.mean(x, axis=0) > 2
output: array([False, True])
在您的代码本身中，这样的事情可以提供帮助
x = np.array([[1,2],[3,4]])
a=(np.mean(x,axis=1)>2)*1
x = x*a
np.array([a[a!=0] for a in x])
给出你想要的输出
array([[2],
[4]])
如果一个元素小于或大于某个值，如何删除 2D numpy 数组中的列
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[英]Get column number of elements that are greater than a threshold in 2D numpy array
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[英]Get indices of elements that are greater than a threshold in 2D numpy array
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[英]How do I convert a 2D numpy array into a 1D numpy array of 1D numpy arrays?
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[英]How do I remove the first and last rows and columns from a 2D numpy array?
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