It is not quite clear to me what you want to do. Do you want to:
- Plot, say, 3 curves, with different color, e.g., one red, one blue, and one green?, or
- Do you want to plot one curve which changes color from, say, red to blue, along the curve?
Case 1.a: Julia v. 0.6.x allowed to make a vector of colors using the
linspace() function, something along
linspace(colorant"red",colorant"blue",5) would make a vector of 5 colors in the range from color
colorant"red" and color
linspace() has been removed, and the replacement,
range() doesn’t support color argument. This is really unfortunate!
Plots syntax is that colors should be a row matrix, so colors in a vector need to be converted to colors in a row matrix.
You can, of course, still make the row matrix of colors manually:
plot([sin,cos,atanh], lc=[:red :blue])
Here, the list of functions will cycle through the row matrix of line colors.
Case 1.b: colors from color gradient.
Use a built-in color gradient, or design your own. Say you want to make your own,
my_cgrad = cgrad([:red, :yellow, :blue])
makes a color gradient that starts in red, goes through yellow and ends up in blue. You need a minimum of two color elements in the argument vector.
To pick plot colors from the color gradient, do the following:
plot([sin, cos, atanh], palette = my_cgrad)
Case 2: Suppose you instead want to change the color along the line – perhaps mainly useful in parametric plots. This can be done as follows:
x = range(0,stop=2pi,length=50)