如何调整Matplotlib嵌入Tkinter的柱状图X轴显示1到24全量小时刻度

核心修改点 #

在原有柱状图绘制代码plot.bar(xlst, ylst)后新增2行配置代码即可实现需求：

• 用set_xlim()限制X轴显示范围，左右各预留0.5边距避免首尾柱状图被裁切
• 用set_xticks()手动指定X轴显示1~24的全部整数刻度

完整可运行代码 #

import tkinter
import matplotlib
from matplotlib.backends.backend_tkagg import (
    FigureCanvasTkAgg, NavigationToolbar2Tk)
from matplotlib.backend_bases import key_press_handler
from matplotlib.figure import Figure
import numpy as np


root = tkinter.Tk()
root.wm_title("Embedding in Tk")

xlst=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24]
ylst=[26, 25, 21, 43, 68, 107, 221, 569, 575, 599, 586, 432, 486, 525, 410, 328, 251, 166, 153, 105, 123, 93, 54, 69]

matplotlib.use("TkAgg")
figure = Figure(figsize=(8,6), dpi=80)
plot = figure.add_subplot(1, 1, 1)

plot.bar(xlst, ylst)
# 新增配置代码
plot.set_xlim(left=0.5, right=24.5)
plot.set_xticks(range(1, 25))
# 若刻度显示拥挤可取消注释下一行旋转刻度
# plot.tick_params(axis='x', rotation=45)

canvas = FigureCanvasTkAgg(figure, root)
canvas.get_tk_widget().grid(row=0, column=0)

tkinter.mainloop()

内容的提问来源于stack exchange，提问作者mrpy