polyfit data use linear and Quadratic
Project description
polyfit 一次/二次拟合工具
说明
本程序主要功能为读取待拟合的数据文件，文件格式可以为.txt 或者.csv格式，以空格分隔，无头部。
通过命令行 polyfit [filename] 执行,如果未指定文件名，则默认寻找当前目录下的 data.txt
数据样本为N行两列的数据，第一列为x, 第二列为Y, 实例数据如下：
0.134 2.79
0.160 3.39
0.195 4.09
0.244 5.19
0.313 6.59
命令行执行
调用 polyfit [data.txt]
执行结果如下：
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