generate-graph-from-pairs

generate-graph-from-pairs Function

Summary

Generates a drawing object which draws lines connecting points.

Package

lw-gt

Signature

generate-graph-from-pairs x-y-pairs &key thickness color x-offset y-offset x-scale y-scale => drawing-object

Arguments

`x-y-pairs`⇩	A list.
`thickness`⇩	A positive real number.
`color`⇩	A Color specification.
`x-offset`⇩, `y-offset`⇩	Non-negative real numbers.
`x-scale`⇩, `y-scale`⇩	Positive real numbers.

Values

drawing-object

A drawing-object.

Description

The function generate-graph-from-pairs generates a "graph", which is a drawing object which draws lines connecting the points in x-y-pairs.

x-y-pairs must be a list where each element is a list of length 2 specifying a point as a pair of coordinates (x, y).

x-scale, y-scale, x-offset and y-offset are used to scale and offset the graph. Each x value is multiplied by x-scale and then x-offset is added, and similarly for the y value. The default value of both x-offset and y-offset is 0. The default value of both x-scale and y-scale is 1.

thickness specifies the thickness of the line, which is not scaled (it passes :scale-thickness nil to make-draw-lines). thickness defaults to 1.

color specifies the foreground color of the line color defaults to :red.

Notes

generate-graph-from-pairs is a quite thin interface on top of make-draw-lines. If it does not do what you want, you can easily replace it by your own code.