There are several files on the FEX which deal with the plotting of colored lines, but they all have some drawbacks. I wrote a little file, which extends the scope of the submission by Kun Liu (s. below, hoping to deliver a general purpose file, which should work for most purposes.
h = cline(x, y [, z, cdata])
x: vector with x-values
y: vector with y-values
z (opt.): vector with z-values
cdata (opt.): vector with color-data
2 input arguments => cdata = y; z=0
3 input arguments => cdata = z
4 i.a. & z =  => cdata = y; z=0
h: Handle to line (i.e. patch-object !!!)
t = 2*pi:.1:8*pi;
cline(sqrt(t).*sin(t), sqrt(t).*cos(t), t);
cline(sqrt(t).*sin(t), sqrt(t).*cos(t), t, rand(size(t))); view(3)
cline(sqrt(t).*sin(t), sqrt(t).*cos(t), , rand(size(t))); view(3)
OK, hope you find this file useful
Sebastian Hölz (2021). cline (https://www.mathworks.com/matlabcentral/fileexchange/14677-cline), MATLAB Central File Exchange. Retrieved .
MATLAB Release Compatibility
Platform CompatibilityWindows macOS Linux
Inspired by: Linear 2D Plot with Rainbow Color
Inspired: Perceptually improved colormaps
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