Python/matplot“fill_between”在 y=7.5 上方停止，我希望它停止

Question

我试图让阴影颜色在 y=7.5 栏处停止，但绿色的颜色还不够远（即到线）。有人能解决这个问题吗？非常感谢！

# sensitivity analysis
sensitivity = pd.DataFrame()
for x in exit_probabilities:
    for y in exit_valuations:
        sensitivity.loc[y, x] = vc_valuation_method_mod(0.15, 5,x, y, 0.5, 5, 10, 6, 100, 80, 2.5)[0]
print(sensitivity)

#Plot data
sns.set(font_scale = 1.5, style = 'white', rc=None)

fig, ax = plt.subplots(figsize = (15,10))

a = sensitivity.plot(y = 0.2, ax = ax, linestyle = '--', color = 'gray')

b = sensitivity.plot(y = 0.3, ax = ax, linestyle = '-.', color = 'gray')
c = sensitivity.plot(y = 0.4, ax = ax, linestyle = ':', color = 'gray')
d = ax.hlines(y=7.5, xmin=100, xmax=900, colors='black', linestyles='-', lw=2, label='Single Short Line')


#ax.fill_between(a, d, alpha=2) 
# fill between y=0.75 and df.y
# Adds headers
sensitivity.columns =['.1', '.15','.2','.25','.3','.35','.4'] 
ax.fill_between(x=sensitivity.index, y1=sensitivity['.2'], y2=7.5, where=sensitivity['.2'] > 7.5, interpolate=True)
ax.fill_between(x=sensitivity.index, y1=sensitivity['.3'], y2=np.maximum(sensitivity['.2'], 7.5), 
                where=sensitivity['.3'] > 7.5, interpolate=True)
ax.fill_between(x=sensitivity.index, y1=sensitivity['.4'], y2=np.maximum(sensitivity['.3'], 7.5), 
                where=sensitivity['.4'] > 7.5, interpolate=True)

plt.show()

sns.despine();

Answer 1

你的第一次填充（蓝色的）很好。

第二个填充应该去：

• 顶部是sensitivity['.3']
• 底部是sensitivity['.2']，但只在大于7.5的地方，所以取sensitivity['.2']和7.5的最大值
• where 参数是 x 轴上的限制；填充应从sensitivity['.3'] 大于7.5 的位置开始；如果你早点开始，matplotlib 将填充在水平线 7.5 和 sensitivity['.3'] 之间

第三次填充与第二次类似。它看起来像：

ax.fill_between(x=sensitivity.index, y1=sensitivity['.2'], y2=7.5, where=sensitivity['.2'] > 7.5, interpolate=True)
ax.fill_between(x=sensitivity.index, y1=sensitivity['.3'], y2=np.maximum(sensitivity['.2'], 7.5), 
                where=sensitivity['.3'] > 7.5, interpolate=True)
ax.fill_between(x=sensitivity.index, y1=sensitivity['.4'], y2=np.maximum(sensitivity['.3'], 7.5), 
                where=sensitivity['.4'] > 7.5, interpolate=True)