python - 在 pyplot 中使用 fill_between() 绘图

Question

我无法绘制模型预测周围的区域，我认为使用 fill_between 绘图会很简单。

对于一个可重现的例子：

df1
  Ground_Truth  Predictions  Predictions_hi  Predictions_lo
410          15.0    14.810122       18.356809       11.263436
85           26.6    27.131472       28.320380       25.942565
280          45.4    45.404620       47.274549       43.534691
422          20.8    19.081849       20.711096       17.452601
199          34.9    29.703281       32.416996       26.989566
364          21.9    49.010702       52.162232       45.859172
5            28.7    27.330305       29.026654       25.633956
415           7.2     8.412145       10.244244        6.580046
209          20.0    17.257462       19.459939       15.054985
284          32.2    28.166823       30.390787       25.942859

json格式的数据：

{"Ground_Truth":{"410":15.0,"85":26.6,"280":45.4,"422":20.8,"199":34.9,"364":21.9,"5":28.7,"415":7.2,"209":20.0,"284":32.2},"Predictions":{"410":14.8101220869,"85":27.1314724323,"280":45.4046198732,"422":19.0818488429,"199":29.7032811382,"364":49.0107021787,"5":27.3303047283,"415":8.4121453666,"209":17.2574622383,"284":28.1668228107},"Predictions_hi":{"410":18.3568086485,"85":28.3203798966,"280":47.2745488681,"422":20.7110962223,"199":32.4169963433,"364":52.1622320467,"5":29.0266538906,"415":10.2442444504,"209":19.4599393417,"284":30.3907868523},"Predictions_lo":{"410":11.2634355254,"85":25.9425649679,"280":43.5346908782,"422":17.4526014635,"199":26.989565933,"364":45.8591723107,"5":25.6339555659,"415":6.5800462828,"209":15.054985135,"284":25.9428587691}}

我的代码如下：

results_df1.plot(x= 'Ground_Truth', y = 'Predictions', kind = 'scatter', color = 'r')
plt.plot(results_df1['Ground_Truth'],results_df1['Ground_Truth'], color = 'b')
plt.fill_between(results_df1['Ground_Truth'], results_df1['Predictions_lo'], results_df1['Predictions_hi'], alpha = 0.1)   
plt.show()

此代码返回以下图：

你看到了我没想到的jig-jag。

标签： pythonpython-3.xpandasmatplotlib