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| Syntax |
gcolorcolors) |
| See Also | gplot , contour , glevel |
| Menu Command | Graphics | Colors . . . |
gcolor sets the current color sequence to the specified colors.
If colors is not present,
gcolor returns the current color sequence.
gcolor,
O-Matrix uses the following sequence of colors for plotting:
"black",
"maroon",
"green",
"olive",
"navy",
"purple",
"teal",
"gray",
"silver",
"red",
"lime",
"yellow",
"blue",
"fuschia", and
"aqua".
That is, the first line plotted with gplot
will be black,
the second will be maroon, and so on.
The sequence starts over after an aqua plot.
(The color sequence is also used by contour
and glevel
.)
The color "white" can be added to the color sequence,
but it is not part of the default sequence.
It is primarily useful for erasing lines from a plot.
ginit
colors = gcolor
print colors
O-Matrix will print the default color sequence in the Command window.
If you then enter
ncolor = rowdim(colors)
gxaxis("linear", 0, 20, 4, 5)
gxtick("outside")
for i = 1 to ncolor begin
x = {i, i}
y = {0, 1}
gplot(x, y)
end
O-Matrix will display one line of each color,
with the index of the color in the sequence equal to the x value in the plot.
gcolor function
can be used to define a different sequence of colors.
For example, if you enter
ginit
gcolor({"red", "yellow", "green"})
gplot(1, 4, "triangle")
gplot(1, 3, "diamond")
gplot(1, 2, "star")
gplot(1, 1, "cross")
O-Matrix will generate a graph with a red triangle at (1, 4),
a yellow diamond at (1, 3),
a green star at (1, 2), and a red cross at (1, 1).