Python-Matplotlib boxplot。如何顯示百分位數0,10,25,50,75,90和100？

Question

我想繪製一個EPSgram（見下文）使用Python和Matplotlib。

boxplot函數只繪製四分位數（0,25,50,75,100）。那麼，我怎樣才能添加兩個盒子呢？

Answer 1

我組建了一個樣本，如果你還是好奇。它採用scipy.stats.scoreatpercentile，但你可能會從其他地方得到這些數字：

from random import random 
import numpy as np 
import matplotlib.pyplot as plt 
from scipy.stats import scoreatpercentile 

x = np.array([random() for x in xrange(100)]) 

# percentiles of interest 
perc = [min(x), scoreatpercentile(x,10), scoreatpercentile(x,25), 
       scoreatpercentile(x,50), scoreatpercentile(x,75), 
       scoreatpercentile(x,90), max(x)] 
midpoint = 0 # time-series time 

fig = plt.figure() 
ax = fig.add_subplot(111) 
# min/max 
ax.broken_barh([(midpoint-.01,.02)], (perc[0], perc[1]-perc[0])) 
ax.broken_barh([(midpoint-.01,.02)], (perc[5], perc[6]-perc[5])) 
# 10/90 
ax.broken_barh([(midpoint-.1,.2)], (perc[1], perc[2]-perc[1])) 
ax.broken_barh([(midpoint-.1,.2)], (perc[4], perc[5]-perc[4])) 
# 25/75 
ax.broken_barh([(midpoint-.4,.8)], (perc[2], perc[3]-perc[2])) 
ax.broken_barh([(midpoint-.4,.8)], (perc[3], perc[4]-perc[3])) 

ax.set_ylim(-0.5,1.5) 
ax.set_xlim(-10,10) 
ax.set_yticks([0,0.5,1]) 
ax.grid(True) 
plt.show()