Calculo practico de la regresion en mediana

Summary

This article explains a metrod to find out the regression line or plane by median similar to linear programing method

The regression line is y=a+bx if$z = \sum {\left| {y_i - a - bx_i } \right|}$ is minimum.

We calculate the intersection of two straight linesi·e:

$$y_i = a + bx_i i = 1 \cdot 2$$

and we shall verify if the point found out produces a minimum inz. If that did not happen, changing sistematicaly the values ora andb we should have the solution.

Also, the regression plane is

$$z = a + bx + cy if Z = \sum {\left| {z_i - a - bx_i - cy_i } \right|} $$

is minimum.

We give, too, the disposition of data in order to make the shortest calculations, as you can see by the two examples.