p1是现在的效果 每个点的横轴数据都记在刻度上 显得很挤
p2是想达到的效果
设置 xticks(横坐标轴刻度)
看看这个
https://blog.csdn.net/qq_38048756/article/details/117718395?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522165907791416782388054065%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=165907791416782388054065&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-2-117718395-null-null.142^v35^control&utm_term=%20xticks%EF%BC%88%E6%A8%AA%E5%9D%90%E6%A0%87%E8%BD%B4%E5%88%BB%E5%BA%A6%EF%BC%89&spm=1018.2226.3001.4449
官方文档
https://matplotlib.org/stable/index.html