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2D color plot with 3 vectors

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Zhiting
Zhiting 2012-3-28
评论： Riley Weatherholt 2021-2-23
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.

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采纳的回答

Walter Roberson
Walter Roberson 2012-3-28
pointsize = 10;
scatter(x, y, pointsize, z)
  2 个评论
Zhiting
Zhiting 2012-3-28
Thanks a lot, Walter. This is what I want!
Riley Weatherholt
Riley Weatherholt 2021-2-23
Thank you!! You just saved me a bunch of time.

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更多回答（3 个）

Richard
Richard 2012-3-28
you could use pcolor(x,y,z). If you need further instruction let me know.
  2 个评论
Zhiting
Zhiting 2012-3-28
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
Walter Roberson 2012-3-28
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.

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Thomas
Thomas 2012-3-28
Just adding if you need a 3d graph:
dotsize=25
scatter3(x(:), y(:), z(:), dotsize, z(:), 'filled')
SSth
SSth 2017-10-26
How can I change color pattern.

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