Discrete Data 3d

Hello there , i have 3-d data so i want to project the third coordinate as a color over the 2-d plane. There is no continuous data to project , instead i have specific points . Sο if i do use the image function i see nothing , and this is reasonable because i project points which is dimensionless , is there any idea how to "extend" these points to make them visible ?

Answer 1

[Walter Roberson]

scatter() and provide the third coordinate as the color information.

Remember to convert the coordinates to column vectors.

[Michalis Chaviaras]

I want the third coordinate represented by a color-density ... like the pictures from image function , no just points with color ..

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/310801-how-to-plot-the-brightness-lines-in-matlab-as-this-picture#answer_242120

[Michalis Chaviaras]

Sorry for misunderstanding , i have already 3-d data calculated , i don't want to calculate the 3rd coordinate based on the (x,y) data . If i do plot data with image i see only blue color at the figure. I think this is because specific points have plotted.