中文说明：对两组离散数据进行分段线性拟合，并显示拟合结果
English Description：
Two groups of discrete data were piecewise linear fitting, and the fitting results were displayed
Two groups of discrete data were piecewise linear fitting
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中文说明：对两组离散数据进行分段线性拟合，并显示拟合结果
English Description：
Two groups of discrete data were piecewise linear fitting, and the fitting results were displayedpiecewise_linear_fitting.txt