Several line plot (2D) with colormap (including labelling)

Dear All Community Members,

I have about 300 lines that I want to be colored depending on a third value in one plot.

I have created a simplified example below to illustrate my problem:

I have 6 lines. The coordinates of the lines are given in the matrices 'x' and 'y' below:

x=[1,3,5,1,3,5;2,4,6,2,4,6]

y=[1,1,1,-1,-1,-1;1,1,1,-1,-1,-1]

The coloring of the lines depends on the values given in vector 'z' below:

z=[3.1,2.2,4.8,1.6,2.9,3.7]

I would also like to add a color label to the plot.

The output plot shall be as below:

N.B. I dont need the text above the lines.

Can anyone assist me?

I appreciate any help you can provide.

[Dyuman Joshi]

How do the z values co-relate to the color values?

What are the boundaries of colors as set in the colorbar in the image you attached?

The rest has been done -

x=[1,3,5,1,3,5;2,4,6,2,4,6];
y=[1,1,1,-1,-1,-1;1,1,1,-1,-1,-1];
z=[3.1,2.2,4.8,1.6,2.9,3.7];
plot(x, y, 'LineWidth', 2)
axis([0 8 -2 2])
colorbar('east')

[Askeladden2]

Thank you for your swift reply.

I want the lines and colorbar to be adjusted automatically to the values in the z vector, if that is possible.

The color boundaries given the example is as follows:

Lines with z-values between 1-1.75 shall be colored red

Lines with z-values between 1.75-2.6 shall be colored orange

Lines with z-values between 2.6-3.4 shall be colored yellow

Lines with z-values between 3.4-4.2 shall be colored green.

Lines with z-values above 4.2 shall be colored blue.

Answer 1

[Dyuman Joshi]

x=[1,3,5,1,3,5;2,4,6,2,4,6];
y=[1,1,1,-1,-1,-1;1,1,1,-1,-1,-1];
z=[3.1,2.2,4.8,1.6,2.9,3.7];
%defining colormap
map=[255 0 0;255 165 0;255 255 0;0 255 0;0 0 255]/255;
%interpolating values according to z
yo=interp1(1:5,map,z);
%plotting
for i=1:size(x,2)
    plot(x(:,i), y(:,i), 'LineWidth', 2.5, 'Color', yo(i,:))
    hold on
end
hold off
%adjusting other properties
axis([0 8 -2 2])
colormap(map)
caxis([1 5])
colorbar('Position', [0.8 0.25 0.04 0.6])

[Askeladden2]

Works perfect.

Thank you very much!

[Dyuman Joshi]

You are welcome!