isigraph: supports graphics using the isigraph control

cile

x. cile values of y.
example:
   3 cile i.12

fitrect01

fit rectangle data to 0 1
form: [anisotropic] fitrect01 data

if left argument is 1, applies same factors to both columns
otherwise, scales columns independently.

fit01

fit data to range 0 1
form: [anisotropic] fit data

if left argument is 1, scales columns independently,
otherwise applies same factors to all data,

gbitmap

bitmap viewer using isigraph control
y. is a boolean matrix

Note max size is about 80 x 80 - after which the graphics buffer
is full.

This function is fast for small bitmaps. Use viewbmp in bmp.ijs
to display larger bitmaps.

e.g.  gshow gbitmap ?40 40$2 [gopen''

gfit

fit data to graphics window

scales each column of data independently to range (0,1000)

glines

display line connecting points

{color;width;style} glines points

points should be a 2 column matrix of xy values

gopen

open graphics window
y. = controlname;parentname
   if either empty, default to 'isigraph'
e.g   gopen ''
      gopen '';'J Graphics'

gpen

set pen color [;width,style]
(default 1,0}

gpolygon

draw polygon given points
{color} gpolygon points

grayscale

generate grayscale
example:
  grayscale (i.%<:) 5

hue

generate color from color set
x. is color set
y. is values from 0 to 1, selecting color

hueRGB

generate color from RGB color se
x. is RGB color set (default HUES)
y. is values from 0 to 1, selecting color

polygon

vertices of a regular polygon
y. = number of points
x. = scale factor on angle 2p1%y.  (default 1)

e.g.   polygon 5 = pentagon
     2 polygon 5 = 5 pointed star

rotate

rotate angle by given amount

e.g. 0.5p1 rotate points = rotate clockwise a quarter turn