plot 3D and combine in matlab

i have this matrix "experiment=2*rand(npoints,3)-1". I want to plot in in 3D,so i use "mesh(experiment)". How can i开发者_开发问答 take red points in my plot?

Also,i want to implement in the above plot , a sphere with radius 1 at 0,0,0. I did :

mesh(experiment)
hold on
[x,y,z]=sphere;
r=1;
mesh(r*x,r*y,r*z)
hold off

but 1) i am not taking radius 1 2) the figures just showing in the same graph but don't combine

Thanks

Use scatter3 to plot points

scatter3(experiment(:,1), experiment(:,2), experiment(:,3), '.r');

See-thru mesh

mesh(r*x,r*y,r*z,  'FaceColor','none', 'EdgeColor','b')

Or semi-transparent mesh

mesh(r*x,r*y,r*z,  'FaceColor','w', 'EdgeColor','b')
alpha(0.5)