Specify range of gradient when plotting lines

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1

Hi all,

I would like to apply a color gradient to lines based on their slopes. The problem I am having is that the line with the smallest slope is not visible. I tried changing the the values argument for cgrad, but I can’t seem to constrain the range so that the lines are visible. Any help would be appreciated.

MWE

using Plots
linear(x, β0, β1) = β0 + β1 * x
x = range(-2, 2, length=50)
β1s = range(0, 2, length=5)
ys = map(β1 -> linear.(x, 0, β1), β1s)
plot(x, ys, line_z = β1s', colorbar=false, leg=:topleft, color = cgrad(:Purples, .0:.1:.4))
2

Pick two named purple colors from here for the end points, and pass it to:

color = cgrad([:lavender, :purple4])
1 Like
3

Thank you! I was just about to explore that possibility when I was looking through some examples where a vector of colors was passed. Good to know that is a solution!

Do you know whether passing 0:.1:.4 to cgrad should have constrained the gradient, or am I misunderstanding its function?

4

I don’t know, I’ve never seen anything like that.

5

Ok. I will mark your answer as the solution. If someone thinks cgrad has bug, please reply.

Thanks again!