Python绘制柱状图

1.1Python绘制柱状图对应代码如下所示

import matplotlib.pyplot as plt
import numpy as np

from pylab import mpl
mpl.rcParams['font.sans-serif'] = ['STZhongsong']    # 指定默认字体：解决plot不能显示中文问题
mpl.rcParams['axes.unicode_minus'] = False

x=["孙悟空","唐僧","猪八戒","沙悟净"]

y=[4,1,3,2]

plt.bar(x,y,width=0.5,align="center",label="战力值",color="red")

plt.title("师徒战力排行榜",loc="center")

for a,b in zip(x,y):
 plt.text(a,b,b,ha='center',va="bottom",fontsize=12)

plt.xlabel('姓名')

plt.ylabel('战力值')

plt.legend()

plt.show()

1.2、最终结果如下图所示

1.3Python绘制横向柱状图

import matplotlib.pyplot as plt
import numpy as np

from pylab import mpl
mpl.rcParams['font.sans-serif'] = ['STZhongsong']    # 指定默认字体：解决plot不能显示中文问题
mpl.rcParams['axes.unicode_minus'] = False

x=["孙悟空","唐僧","猪八戒","沙悟净","牛魔王","哪吒","二郎神"]

y=[10,1,6,5,7,8,9]

plt.barh(x,width=y,height=0.6,align="center",label="战力值",color="green",edgecolor="rgb")
'''
width 表示柱子的宽度，每根柱子的宽度可以都一样，也可以各不相同
align center:表示柱子位于x值的中心位置，edge:表示柱子位于x值的右边
color 柱子的颜色
edgecolor 柱子边缘的颜色
'''
plt.title("战力排行榜",loc="center")

for a,b in zip(x,y):
 plt.text(b,a,b,ha='center',va="bottom",fontsize=12)

plt.xlabel('姓名')

plt.ylabel('战力值')

plt.legend()

plt.show()

1.4最终结果如下图所示

 1.5Python绘制堆叠柱状图

import matplotlib.pyplot as plt
import numpy as np

from pylab import mpl
mpl.rcParams['font.sans-serif'] = ['STZhongsong']    # 指定默认字体：解决plot不能显示中文问题
mpl.rcParams['axes.unicode_minus'] = False

x=["唐僧","孙悟空","猪八戒","沙悟净"]

y1=[10,6,3,7]

y2=[3,10,7,6]

list3=[]
for i in range(len(y1)):
    new_value=y1[i]+y2[i]
    list3.append(new_value)

plt.bar(x,y1,width=0.3,label="魅力值",color="orange")

plt.bar(x,y2,width=0.3,label="武力值",color="red",bottom=y1)

plt.title("师徒战力排行榜")

for a,b in zip(x,y1):
 plt.text(a,b,b,ha='center',va="top",fontsize=12)

for a,b,c in zip(x,list3,y2):
 plt.text(a,b,c,ha='center',va="bottom",fontsize=12)

plt.xlabel('姓名')

plt.ylabel('魅力值')

plt.legend(loc="best")

plt.show()

1.6最终结果如下图所示

1.7Python绘制并列柱状图

import matplotlib.pyplot as plt
import numpy as np

from pylab import mpl
mpl.rcParams['font.sans-serif'] = ['STZhongsong']    # 指定默认字体：解决plot不能显示中文问题
mpl.rcParams['axes.unicode_minus'] = False

plt.subplot(1,1,1)

x=np.array([1,2,3,4])

y1=[10,6,3,7]

y2=[3,10,7,6]

plt.bar(x,y1,width=0.3,align="center",label="魅力值")

plt.bar(x+0.3,y2,width=0.3,align="center",label="武力值")

plt.title("师徒战力排行榜")

for a,b in zip(x,y1):
 plt.text(a,b,b,ha='center',va="bottom",fontsize=12)

for a,b in zip(x+0.3,y2):
 plt.text(a,b,b,ha='center',va="bottom",fontsize=12)

plt.xlabel('姓名')

plt.ylabel('魅力值')

plt.xticks(x+0.15,["唐僧","孙悟空","猪八戒","沙悟净"])

plt.legend()

plt.show()

1.8最终结果如下所示