12 Plot

(require mrlib/plot)

The mrlib/plot library provides a simple tool for plotting data values to a device context.

(struct data-set (points connected? pen min-x max-x min-y max-y))

points : (listof (is-a?/c point%))

connected? : any/c

pen : (is-a?/c pen%)

min-x : real?

max-x : real?

min-y : real?

max-y : real?

The points field contains the data values to plot, and connected? indicates whether the points are connected by a line. The pen field provides a pen for plotting points/lines. The remaining fields determine the plotting area within a drawing context.

(struct   plot-setup  ( axis-label-font         axis-number-font         axis-pen         grid?         grid-pen         x-axis-marking         y-axis-marking         x-axis-label         y-axis-label))

axis-label-font : (is-a?/c font%)

axis-number-font : (is-a?/c font%)

axis-pen : (is-a?/c pen)

grid? : any/c

grid-pen : (is-a?/c pen)

x-axis-marking : (listof real?)

y-axis-marking : (listof real?)

x-axis-label : string?

y-axis-label : string?

Configures a plot. The grid? field determines whether to draw a grid at axis markings, and the x-axis-marking and y-axis-marking lists supply locations for marks on each axis. The other fields are self-explanatory.

(plot dc data setup) → void?

dc : (is-a?/c dc<%>)

data : (listof data-set?)

setup : plot-setup?

Draws the data-sets in data into the given dc. Uses drawing-context coordinates in data-sets that will accommodate all of the data sets.