Unbiased bisector on Scatter plot

Question

Hi, 
Is there a way to plot the 1:1 bisector on a scatter plot. I have plotted the fit line but i want the 1:1 bisector to show potential bias in the data.

jthi · Accepted Answer

You can use graphic scripts to add extra lines to your graphs. For example line built using

Line({X Origin(), Y Origin()}, {X Origin() + X Range(), Y Origin() + Y Range()}); will go from bottom left to top right and you can replace X Origin()... and so on with your own values as needed

Names Default To Here(1);

dt = open("$SAMPLE_DATA/Big Class.jmp");

gb = dt << Graph Builder(
	Variables(X(:weight), Y(:height), Overlay(:sex)),
	Elements(Points(X, Y, Legend(9)))
);

Report(gb)[FrameBox(1)] << Add Graphics Script(
	Pen Color("Blue");
	Pen Size(1);
	Line({X Origin(), Y Origin()}, {X Origin() + X Range(), Y Origin() + Y Range()});
);