Create 3D scatter plot from an 120x160 matrix

I have an excel file with a 120 x 160 array and I need to make a 3D scatter plot of the data. I could easily do it on Mathcad but can't get 'scatter3' to work.

Any suggestions will be appreciated!

Thanks

Answer 1

[Chad Greene]

Perhaps you need to columnate all your variables using (:). Like this:

[x,y,z] = peaks(150); 
scatter3(x(:),y(:),z(:),10,z(:))

But if your data are gridded, why not use surf?

surf(x,y,z) 
shading flat

[Mir Sharmin]

scatter3 asks for a vector and doesn't take the matrix array as an input so that problem still remains.

And, unfortunately I don't think a surface plot will work for the project I am working on!

Thanks though!

[Chad Greene]

Yes, by columnating all the inputs with (:), it turns them into vectors. Did you try the example I provided with the peaks data?

Answer 2

[Walter Roberson]

[Y, X] = ndgrid(1:size(YourArray,1), 1:size(YourArray,2));
scatter3(X(:), Y(:), YourArray(:));

Notice that Y corresponds to rows not columns