treePlotArea (version 3.1.0)

orthogonal: Get the Slope–intercept Form of an Orthogonal

Description

If slope-point form of an equation is given, we might be interested in the slope-intercept form of the orthogonal to the equation running through the point.

Usage

orthogonal(b, xy)

Value

A named vector with intercept ["a"] and slope ["b"], as in graphics::abline. If the slope was 0, there is no slope-intercept form as this is a vertical line. Then the intercept is NA and the slope gives the value of x.

Arguments

b

The slope.

xy

The point.

Examples

orthogonal(1, c(x = 0, y = 0))
orthogonal(0, c(x = 4, y = 0))
orthogonal(-1, c(x = -2, y = -2))
orthogonal(Inf, c(x = 0, y = 4))