利用Fortran程式計算平面座標上各點的最適線，其座標上各點到此線段的距離為最小，此法稱為最小方差法，InputX及InputY分別為平面座標上各點的X座標及Y座標，輸入完成後，執行LS.EXE，接著在輸入所要計算的線段的最高次方，以及座標點的個數即可，接著程式便會產生一個OUTPUT，內容從上而下分別為最高次方項至常數項，舉例來說，若最高次方項為2。則計算出的結果第一項便為y=ax+b的a，第二行便為b`.-Fortran program using the calculation plane coordinates at various points along the optimal line, its coordinates at various points along this line segment the smallest distance, this method is called minimum variance method, InputX and InputY were points on the plane coordinates X and Y coordinates coordinates, input is completed, the implementation of LS.EXE, and then calculated in the input segment to be the highest-th power, as well as the number of coordinates of points you can, then the program will generate an OUTPUT, the content from the top, respectively the highest-th power entry to the constant term, for example, if the maximum entry of 2-th power. Then the calculated results of the first will be for the y = ax+ b of a, the second line will be for the b `.