初学Bokeh：绘制条形图【7】跬步

Step1：引用figure、show函数

from bokeh.plotting import figure, show

Step2：定义绘图数据

# prepare some data
x = [1, 2, 3, 4, 5]
y1 = [6, 7, 2, 4, 5]
y2 = [2, 3, 4, 5, 6]
y3 = [4, 5, 5, 7, 2]

Step3：创建绘图对象

# create a new plot with a title and axis labels
p = figure(title="Multiple glyphs example", x_axis_label="x", y_axis_label="y")

Step4：绘制折线图、条形图、圆形图

# add multiple renderers
# 绘制折线图
p.line(x, y1, legend_label="Temp.", line_color="blue", line_width=2)
# 绘制条形图，位置（x，y2）；图例：Rate；条形的宽度：0.5；条形底部对应的数值：0；条形填充颜色：red
p.vbar(x=x, top=y2, legend_label="Rate", width=0.5, bottom=0, color="red") 
# 绘制圆形
p.circle(x, y3, legend_label="Objects", line_color="yellow", size=12)  

Step5：显示绘图对象

# show the results 
show(p)  

PS:由于绘图的时候是按照折线图、条形图、圆形图的次序绘制，因此条形图会遮挡住折线图，圆形图会遮挡住折线图和条形图。