vb操作Excel示例,数据统计表,线条填充,指数曲线拟合-vb Operation Excel example, data tables, line filling, exponential curve fitting

Qt5下，采用QCustomplot控件绘制曲线，采用最小二乘算法拟合曲线，进行线性拟合，多项式拟合和指数拟合-Under Qt5, using QCustomplot control plotted using least-squares curve fitting algorithms, linear fit, polynomial fitting and exponential fitting