ListLinePlot with colors from data

Question

I am trying to color a simple 2D plot (using ListLinePlot) based on data in the form of 3-vectors.

ListLinePlot[data[[All, {1, 2}]]]

I would like to use one of the ColorData color schemes (like "Temperature") for the line color, depending on this third value in my table 3-vectors. That is,Data[[All, 3]] will be the source of the color-coding values.

Answer 1

I think something like this is what you're after (I created some data for this example):

data = Range@20;
tbl = Transpose[{data, data^3, data/25}];

ListLinePlot[tbl[[All, {1, 2}]], 
 ColorFunction -> Function[{x, y}, Darker[ColorData["Temperature"][tbl[[Round[x], 3]]], .2]], 
 ColorFunctionScaling -> False]

Setting the ColorFunctionScaling to False gets you the X value which is then used to index back into your data to get the desired index of the color scheme. Note that if your actual X values are not integers, you'll need to use other means (lookup, or an incrementing counter) to index into the desired color. Here's an example of that:

colors = tbl[[All, 3]]l
cnt = 1;

ListLinePlot[tbl[[All, {1, 2}]], 
 ColorFunction -> Function[{x, y}, Darker[ColorData["Temperature"][colors[[cnt++]]], .2]]]

Answer 2

data = Table[{Cos[k 2 Pi/7.], Sin[k 2 Pi/7.], k/21.}, {k, 0, 21, 3}];

colors = VertexColors -> (Hue /@ Last /@ data)

plot = ListLinePlot[Most /@ data, AspectRatio -> 1, ColorFunction -> Function[{x, y}, Hue@y]];

plot[[1, 2, 3]] = colors;

plot