[英]How do I keep the smaller value in a bar chart in front (when I cannot place the bars side by side)?
我正在圖表上繪制兩組數據,這些數據具有沿x軸的氨基酸位置。 有時測定1作為較小的值,有時測定2具有較小的值。 如何確保較低的值始終在前面?
我正在使用python和matplotlib / pyplot。
現在我添加兩個條形圖:
p1 = plot.bar(x1, y1, color='r', alpha=1, edgecolor='none',linewidth=0,width=0.5, log=False)
p2 = plot.bar(x2, y2, color='b', alpha=1, edgecolor='none', linewidth=0,width=0.5, log=False)
謝謝!
您可以使用numpy.ma
模塊來定義掩碼:
import numpy.ma as ma
mask1 = ma.where(y1>=y2)
mask2 = ma.where(y2>=y1)
p1 = plt.bar(x1[mask1], y1[mask1], color='r', alpha=1, edgecolor='none',linewidth=0,width=0.5, log=False)
p2 = plt.bar(x2, y2, color='b', alpha=1, edgecolor='none', linewidth=0,width=0.5, log=False)
p3 = plt.bar(x1[mask2], y1[mask2], color='r', alpha=1, edgecolor='none',linewidth=0,width=0.5, log=False)
例:
import matplotlib.pyplot as plt
import numpy as np
import numpy.ma as ma
x1 = x2 = np.arange(5)
y1 = np.array([1,4,25,2,4])
y2 = np.array([4,2,3,32,6])
mask1 = ma.where(y1>=y2)
mask2 = ma.where(y2>=y1)
p1 = plt.bar(x1[mask1], y1[mask1], color='r', alpha=1, edgecolor='none',linewidth=0,width=0.5, log=False)
p2 = plt.bar(x2, y2, color='b', alpha=1, edgecolor='none', linewidth=0,width=0.5, log=False)
p3 = plt.bar(x1[mask2], y1[mask2], color='r', alpha=1, edgecolor='none',linewidth=0,width=0.5, log=False)
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