您如何在Numpy中找到IQR?
发布于 2021-01-29 17:49:29
是否有内置的Numpy / Scipy函数来查找四分位数范围?我自己可以很容易地做到这一点,但是mean()
基本上存在sum/len
…
def IQR(dist):
return np.percentile(dist, 75) - np.percentile(dist, 25)
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np.percentile
接受多个百分位参数,这样做会稍微好一些:q75, q25 = np.percentile(x, [75 ,25]) iqr = q75 - q25
要么
iqr = np.subtract(*np.percentile(x, [75, 25]))
而不是两次致电
percentile
:In [8]: x = np.random.rand(1e6) In [9]: %timeit q75, q25 = np.percentile(x, [75 ,25]); iqr = q75 - q25 10 loops, best of 3: 24.2 ms per loop In [10]: %timeit iqr = np.subtract(*np.percentile(x, [75, 25])) 10 loops, best of 3: 24.2 ms per loop In [11]: %timeit iqr = np.percentile(x, 75) - np.percentile(x, 25) 10 loops, best of 3: 33.7 ms per loop