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: 4.0.2

 

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.