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Python 使用 matplotlib 画图是非常方便的,之前的文章记录了《Python 使用 matplotlib 画折线图教程》,今天就再次记录一下使用 matplotlib 画柱状图的教程。一般来说,也就折线图和柱状图这两种图比较常见,所以基本上老唐也就用了这两个。
一、基本柱状图
代码:
import matplotlib.pyplot as plt data = [5, 20, 15, 25, 10] plt.bar(range(len(data)), data) plt.show()
效果:
二、并列柱状图
绘制并列柱状图与堆叠柱状图类似,都是绘制多组柱体,只需要控制好每组柱体的位置和大小即可。例如:
import numpy as np import matplotlib.pyplot as plt size = 5 x = np.arange(size) a = np.random.random(size) b = np.random.random(size) c = np.random.random(size) total_width, n = 0.8, 3 width = total_width / n x = x - (total_width - width) / 2 plt.bar(x, a, width=width, label='a') plt.bar(x + width, b, width=width, label='b') plt.bar(x + 2 * width, c, width=width, label='c') plt.legend() plt.show()
效果:
如果想加点坐标轴标题什么的,参考下面的代码,我就不提取了,大家看一下就懂:
#柱状图 import numpy as np import matplotlib.pyplot as plt ATT_LSTM = [0.8892,0.861,0.9243] MATT_CNN = [0.8966,0.8556,0.9316] ATT_RLSTM = [0.8867,0.8543,0.9344] CNN_RLSTM = [0.9016,0.8636,0.9435] #x = ['REST','LAPT','AUTO'] x = np.arange(3) #总共有几组,就设置成几,我们这里有三组,所以设置为3 total_width, n = 0.8, 4 # 有多少个类型,只需更改n即可,比如这里我们对比了四个,那么就把n设成4 width = total_width / n x = x - (total_width - width) / 2 plt.bar(x, ATT_LSTM, color = "r",width=width,label='ATT-LSTM ') plt.bar(x + width, MATT_CNN, color = "y",width=width,label='MATT-CNN') plt.bar(x + 2 * width, ATT_RLSTM , color = "c",width=width,label='ATT-RLSTM') plt.bar(x + 3 * width, CNN_RLSTM , color = "g",width=width,label='CNN-RLSTM') plt.xlabel("dataset") plt.ylabel("accuracy") plt.legend(loc = "best") plt.xticks([0,1,2],['REST','LAPT','AUTO']) my_y_ticks = np.arange(0.8, 0.95, 0.02) plt.ylim((0.8, 0.95)) plt.yticks(my_y_ticks) plt.show()
参考文献:
- https://zhuanlan.zhihu.com/p/25128216
- https://blog.csdn.net/u012328159/article/details/79240652