Origin 7中Linear Fit有Through Zero选项
Origin 8以上官方论坛的答复
You cannot constrain a fit through a point. You can use error bars to force a fit through a point. Set your error bar values to 1 except at the point in question where you can use a small, non-zero value (1E-3). Be sure to plot the error bars.
需要添加(0,0)点和一列误差列，其中原点对应的误差设置非常小
回复此楼
你的数据点在那里摆着 怎么让它过原点那？要不然你拟合个指数？ 
