▼ |  | PLo T: Graph Plotting

1 | Quick Start
2 | Plotting
3 | Customizing Plots

On this page:

sample-size
scale-vectors
x-values
normalize-vector
normalize-vectors
make-column
xy-list
zgrid
plot-view%
get-x-min
get-y-min
get-x-max
get-y-max
set-line-color
set-line-width
2d-view%
set-labels
plot-vector
plot-vectors
plot-points
plot-line
plot-contours
plot-shades
3d-view%
plot-surface
plot-line
get-z-min
get-z-max
get-alt
get-az

Version: 4.1.4
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### 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.

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