matplotlib 直方图绘制

import matplotlib.pyplot as plt
import numpy as np

if __name__ == "__main__":

    # 0、修改支持中文的字体
    plt.rcParams["font.sans-serif"] = ["SimHei"] # 设置字体
    plt.rcParams["axes.unicode_minus"] = False # 解决图像中 "-" 负号乱码问题

    # 电影时长分布
    time = [131, 98, 125, 131, 124, 139, 131, 117, 128, 108, 135, 138, 131, 102, 107, 114, 119, 128, 121, 142, 127, 130,
            124, 101, 110, 116, 117, 110, 128, 128, 115, 99, 136, 126, 134, 95, 138, 117, 111, 78, 132, 124, 113, 150,
            110, 117, 86, 95, 144, 105, 126, 130, 126, 130, 126, 116, 123, 106, 112, 138, 123, 86, 101, 99, 136, 123,
            117, 119, 105, 137, 123, 128, 125, 104, 109, 134, 125, 127, 105, 120, 107, 129, 116, 108, 132, 103, 136,
            118, 102, 120, 114, 105, 115, 132, 145, 119, 121, 112, 139, 125, 138, 109, 132, 134, 156, 106, 117, 127,
            144, 139, 139, 119, 140, 83, 110, 102, 123, 107, 143, 115, 136, 118, 139, 123, 112, 118, 125, 109, 119, 133,
            112, 114, 122, 109, 106, 123, 116, 131, 127, 115, 118, 112, 135, 115, 146, 137, 116, 103, 144, 83, 123, 111,
            110, 111, 100, 154, 136, 100, 118, 119, 133, 134, 106, 129, 126, 110, 111, 109, 141, 120, 117, 106, 149,
            122, 122, 110, 118, 127, 121, 114, 125, 126, 114, 140, 103, 130, 141, 117, 106, 114, 121, 114, 133, 137, 92,
            121, 112, 146, 97, 137, 105, 98, 117, 112, 81, 97, 139, 113, 134, 106, 144, 110, 137, 137, 111, 104, 117,
            100, 111, 101, 110, 105, 129, 137, 112, 120, 113, 133, 112, 83, 94, 146, 133, 101, 131, 116, 111, 84, 137,
            115, 122, 106, 144, 109, 123, 116, 111, 111, 133, 150]

    plt.figure(figsize=(20, 8), dpi=80)

    # 组距
    dist = 2
    # 组数
    group_number = (max(time) - min(time)) // 2

    # bins 组数
    # density 是否显示频率，不显示频率就是显示频数
    # plt.hist(time, bins=group_number)
    # 显示频率
    plt.hist(time, bins=group_number, density=True)

    plt.xticks(range(min(time), max(time) + 2, dist))
    plt.grid(linestyle="--", alpha=0.5)

    plt.show()

1、组距会影响直方图的显示效果，请注意组距的设置

2、直方图应用场景：用于表示分布情况，通过直方图还可以观察和估计哪些数据比较集中，异常或者孤立数据分布在何处