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task
- gui界面,读取xlsx中特定sheet,sheet中最后一列为y,前n列为x1-xn,线性拟合为y=b0+b1x1+...+bnxn,显示公式和残差的标准差(The GUI interface reads the specific sheet in xlsx, the last row in sheet is y, the former n is x1-xn, and the linear fitting is y=b0+b1x1+ (+bnxn), showing the standard