How can I change color of a straight line based on a numeric value ?

Hello Matlabers!! I need to plot n straight lines for which I will be getting data from a .csv file. The data will be x1, y1, x2, y2, ppm. where ppm is the a measure of something. I need to plot all lines in a single plot with the color of the lines based on ppm value.

Can you help me with this ?

I appreciate your time...

Thanks

Answer 1

[Walter Roberson]

http://www.mathworks.co.uk/matlabcentral/answers/5042-how-do-i-vary-color-along-a-2d-line

http://www.mathworks.co.uk/matlabcentral/answers/64945-color-contours-along-a-line

[Jujhar Khurana]

Thanks Walter.

But my question is a little bit different. Please have a look at my code.

LinkMat = xlsread('abc.xlsx','abc');

LinkMat(:,3) = log(LinkMat(:,3)+1);

hold on;

for i = 1:size(LinkMat,1)

    %      X              Y         
    plot(LinkMat(i,1), LinkMat(i, 2));
    grid on;
end
hold off;

I need to color these individual points based on a scale for example, if min value of intensity is 0 and max. value is 20 then a value of 1.1 will be light blue, 2.3 would be blue and so on.

I guess there is some ColorMapscale function that can be used. but I am not sure. Can you suggest something.

Thanks,

[Walter Roberson]

If you want to color individual points and not draw any connecting line, then use scatter() instead of plot()