1 Aligned Pasteboard
2 Bitmap Label
3 Cache-image Snip
4 GIF and Animated GFI Writing
5 Graphs
6 Hierarchical List Control
7 Include Bitmap
8 Interactive Value Port
9 Name Message
10 Path Dialog
11 Plot
12 Switchable Button
13 Acknowledgments
Index
On this page:
data-set
plot-setup
plot
Version: 4.0.2

 

11 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.