how to set color in plot

actually,i try to create a plot that containts three variables (structure, noise, diversity). i use the data that generated from excel. the most important fact is how to set color of the data as in the example image

example data from excel : structure = 0.7; noise = 6; diversity = 14; visual complexity value = 0.4; then, color of data = purpel

[Jan]

I've tried to close this message without success. Due to the absolute absence of any information about this image, it is impossible to guess, what exactly you try to "make".

This is actually such lean, that I think of a late April joke.

[Jan]

Thanks for editing your question. Does this mean, that you want to create a colormap? I don't understand, what the "example data" mean. Are you looking for a method to set the color of drawn points, or a function to define the color depending on the values?

Please do not let us guess the details.

[Fathor]

thanks for your concern. i mean, sample data from excel. so, i try to create plot with four variable (structure,noise,diversity,visualcomplexity). where visualcomplexity defined by color

[Walter Roberson]

That's what my scatter3() solution does.

Answer 1

[Walter Roberson]

PointSize = 10;

scatter3(structure(:), noise(:), diversity(:), PointSize, visualcomplexity(:))

[Fathor]

thank you, it work. but I have not been able to adjust the color of variable visualcomplexity. for example : 0-3=blue; 3.1-6=purple; 6.1-10=red;

[Walter Roberson]

ccolors = [0 0 1;
           1 0 1;
           1 0 0];

binedges = [0 3 6 inf];
[counts, binindx] = histc(visualcomplexity, binedges);

scatter3(structure(:), noise(:), diversity(:), PointSize, ccolors(binidx(:), :) );

[Fathor]

thank you very much for your answer, it work...it's really what i want