//
//Draw regressin line or squrare with data
//
//this plot command draws regression line or square.

//Syntax
plot reg;

//Cation
//Befor this plot command,you have to read outputs of regression.
//if 2 dimension regression ex. y=a*x+b,plot reg draws line.
//if 3 dimension regression ex. z=a*x+b*y+c,plot reg draws square.

//Example is 3 dimension regresion square.
get iris@;

//regression in 3 dimension.
reg PetalL by SepalW SepalL;

//get regression coefficent from outputs.
get freq@ana;

//draws regression square.
plot reg;