3 Customizing Plots

(require plot/extend)

The plot/extend module allows you to create your own constructors, further customize the appearance of the plot windows, and in general extend the package.

(sample-size sample-count x-min x-max) → real?

sample-count : exact-positive-integer?

x-min : number

x-max : number

Given sample-count, x-min, and x-max, returns the size of each sample.

(scale-vectors   vecs             x-sample-size             y-sample-size)   →   (listof vector?)

vecs : (listof vector?)

x-sample-size : real?

y-sample-size : real?

Scales vectors, causing them to fit in their boxes.

(x-values sample-count x-min x-max) → (listof real?)

sample-count : exact-positive-integer?

x-min : number

x-max : number

Given samples, x-min, and x-max, returns a list of xs spread across the range.

(normalize-vector   vec             x-sample-size             y-sample-size)   →   vector?

vec : vector?

x-sample-size : real?

y-sample-size : real?

Normalizes vec based on x-sample-size and y-sample-size.

(normalize-vectors   vecs             x-sample-size             y-sample-size)   →   (listof vector?)

vecs : (listof vector?)

x-sample-size : real?

y-sample-size : real?

Normalizes vecs based on x-sample-size and y-sample-size.

(make-column x ys) → (listof (vector/c real? real?))

x : real?

ys : (listof real?)

Given an x and a list of ys, produces a list of points pairing the x with each of the ys.

(xy-list sample-count x-min x-max y-min y-max)

→ (listof (listof (vector/c real? real?)))

sample-count : exact-positive-integer?

x-min : real?

x-max : real?

y-min : real?

y-max : real?

Makes a list of all the positions on the graph.

(zgrid f xs ys) → (listof (listof real?))

f : (real? real? . -> . real?)

xs : (listof real?)

ys : (listof real?)

Given a function that consumes x and y to produce z, a list of xs, and a list of ys, produces a list of z column values.

plot-view% : class?

superclass: object%

(send a-plot-view get-x-min) → real?

Returns the minimum plottable x coordinate.

(send a-plot-view get-y-min) → real?

Returns the minimum plottable y coordinate.

(send a-plot-view get-x-max) → real?

Returns the maximum plottable x coordinate.

(send a-plot-view get-y-max) → real?

Returns the maximum plottable y coordinate.

(send a-plot-view set-line-color color) → void?

color : plot-color?

Sets the drawing color.

(send a-plot-view set-line-width width) → void?

width : real?

Sets the drawing line width.

2d-view% : class?

superclass: plot-view%

Provides an interface to drawing 2-D plots. An instance of 2d-view% is created by plot, and the following methods can be used to adjust it.

(send a-2d-view set-labels   x-label             y-label             title)   →   void?

x-label : string?

y-label : string?

title : string?

Sets the axis labels and title.

(send a-2d-view plot-vector head tail) → void?

head : (vector/c real? real?)

tail : (vector/c real? real?)

Plots a single vector.

(send a-2d-view plot-vectors vecs) → void?

vecs   :   (listof (list/c (vector/c real? real?)               (vector/c real? real?)))

Plots a set of vectors.

(send a-2d-view plot-points points sym) → void?

points : (listof (vector/c real? real?))

sym : (one-of/c 'square 'circle 'odot 'bullet)

Plots points using a specified symbol.

(send a-2d-view plot-line points) → void?

points : (listof (vector/c real? real?))

Plots a line given a set of points.

(send a-2d-view plot-contours   grid             xs             ys             levels)   →   void?

grid : (listof (listof real?))

xs : (listof real?)

ys : (listof real?)

levels : (listof real?)

Plots a grid representing a 3-D function using contours to distinguish levels.

(send a-2d-view plot-shades   grid             xs             ys             levels)   →   void?

grid : (listof (listof real?))

xs : (listof real?)

ys : (listof real?)

levels : (listof real?)

Plots a grid representing a 3-D function using shades to show levels.

3d-view% : class?

superclass: plot-view%

Provides an interface to drawing 3-D plots. An instance of 3d-view% is created by plot3d, and the following methods can be used to adjust it.

(send a-3d-view plot-surface xs ys zs) → void?

xs : (listof real?)

ys : (listof real?)

zs : (listof real?)

Plots a grid representing a 3d function in a 3d box, showing only the top of the surface.

(send a-3d-view plot-line xs ys zs) → void?

xs : (listof real?)

ys : (listof real?)

zs : (listof real?)

Plots a line in 3-D space.

(send a-3d-view get-z-min) → real?

Returns the minimum plottable z coordinate.

(send a-3d-view get-z-max) → real?

Returns the maximum plottable z coordinate.

(send a-3d-view get-alt) → real?

Returns the altitude (in degrees) from which the 3-D box is viewed.

(send a-3d-view get-az) → real?

Returns the azimuthal angle.