refline (Statistics Toolbox)

Add a reference line to the current axes.

Syntax

refline(slope,intercept)
refline(slope)
h = refline(slope,intercept)
refline

Description

refline(slope,intercept) adds a reference line with the given slope and intercept to the current axes.

refline(slope), where slope is a two-element vector, adds the line

     y = SLOPE(2) + SLOPE(1)x

to the figure.

h = refline(slope,intercept) returns the handle to the line.

refline with no input arguments superimposes the least squares line on each line object in the current figure (except LineStyles '-','- -','.-'). This behavior is equivalent to lsline.

Example

y = [3.2 2.6 3.1 3.4 2.4 2.9 3.0 3.3 3.2 2.1 2.6]';
plot(y,'+')
refline(0,3)