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# isigraph: supports graphics using the isigraph control

method: gopen'' opens a graphics window g... fns to generate graphics gshow'' show graphics

points are plotted in a box with coordinates (0,0) at bottom left to (1000,1000) at top right.

points should be given as a 2 element vector or 2 column matrix colors should be given as 3 numbers in range (0,255) for RGB, or as a single RGB number.

see also isigutil.ijs for various supporting utilities.

Name | Type | Description
cile | verb | x. cile values of y.
fitrect01 | verb | fit rectangle data to 0 1
fitrect11 | verb | fit rectangle data to _1 1
fit01 | verb | fit data to range 0 1
fit11 | verb | fit data to range _1 1
gbitmap | verb | bitmap viewer using isigraph control
gbrush | verb | set brush color
gclear | verb | clear graphics window
gfit | verb | fit data to graphics window
glines | verb | display line connecting points
gopen | verb | open graphics window
gpen | verb | set pen color [;width,style]
gpolygon | verb | draw polygon given points
grayscale | verb | generate grayscale
grgb | verb | set color values
gscale | verb | scale from (-1,1) to (0,1000)
gshow | verb | {parent} gshow graph
hue | verb | generate color from color set
hueRGB | verb | generate color from RGB color se
polygon | verb | vertices of a regular polygon
rotate | verb | rotate angle by given amount

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

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