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

//Syntax
plot reg;

//Option
//title=title strings
//xlabel=x axis strings
//ylabel=y axis strings
//zlabel=z axis strings
//xrange=[xmin:xmax]
//yrange=[ymin:ymax]
//zrange=[zmin:zmax]
//marker:marker type  example:o,+,x,A,V,box,OF,BF,AF,VF,DF,PF
//color:color  example:black,red,blue,green,yellow
//marksize:marker size
//width:line size
//regcolor:regression line color
//xrotate=90  //vertical x tics

//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@.csv;




//regression only setosa.
if(Species == "setosa") outrec;
reg SepalL by SepalW;

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

plot reg/
marker=OF
color=blue
regcolor=red
;



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

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

//draws regression square.
plot reg/
marker=OF
color=blue
regcolor=red
;