Kas*_*ska 5 python intervals median
如何在python中为我的数据找到中位数附近的置信区间?
说我有数组
a = np.array([24, 38, 61, 22, 16, 57, 31, 29, 35])
Run Code Online (Sandbox Code Playgroud)
我想在中位数附近找到 80% 的置信区间。我如何在 python 中做到这一点?
我执行此过程来计算中位数周围的置信区间。
对于您的示例,设置cutoff=0.8. 这需要python > 3和pandas > 1。
它假设您将数组作为pd.Series.
import statistics, math
import pandas as pd
def median_confidence_interval(dx,cutoff=.95):
''' cutoff is the significance level as a decimal between 0 and 1'''
dx = dx.sort_values(ascending=True, ignore_index=True)
factor = statistics.NormalDist().inv_cdf((1+cutoff)/2)
factor *= math.sqrt(len(df)) # avoid doing computation twice
lix = round(0.5*(len(dx)-factor))
uix = round(0.5*(1+len(dx)+factor))
return (dx[lix],dx[uix])
a = np.array([24, 38, 61, 22, 16, 57, 31, 29, 35])
print(median_confidence_interval(df,cutoff=0.8))
# (29,57)
Run Code Online (Sandbox Code Playgroud)