2D color plot with 3 vectors

I have three vectors: x, y and z. Each (x(i), y(i)) coordinate corresponds to one z(i). I want to plot a 2D plot with x, y as axes and z denotes the colors. What should I do? Thanks a lot.

Answer 1

[Walter Roberson]

pointsize = 10;
scatter(x, y, pointsize, z)

[Zhiting]

Thanks a lot, Walter. This is what I want!

[Riley Weatherholt]

Thank you!! You just saved me a bunch of time.

Answer 2

[Richard]

you could use pcolor(x,y,z). If you need further instruction let me know.

[Zhiting]

I have checked that before. z must be matrix in order to use pcolor. But I have three vectors. It doesn't work.

[Walter Roberson]

image() would be better than pcolor().

pcolor() and image() would assume that you have a full matrix of data, but the user only has vectors -- scattered points.

Answer 3

[Thomas]

Just adding if you need a 3d graph:

dotsize=25
scatter3(x(:), y(:), z(:), dotsize, z(:), 'filled')

[Zhiting]

Thanks, Thomas~

Answer 4

[SSth]

How can I change color pattern.