How can i get standard deviation in a scatter3 plot

figure
scatter3(SL0,SR0,V0,15)
hold on
scatter3(SL20,SR20,V20,15)
scatter3(SL30,SR30,V30,15)
plot3(L2,L1,L3,'b')
plot3(LL2,LL1,LL3,'r')
plot3(LLL2,LLL1,LLL3,'k')
hold off
grid on

This is my current code which gives me

I would like to get a standard deviation in both x,y,z direction for each of the data points (the 9 dots). I think it's rather advanced, so is it even possible?

[KSSV]

Read about std

Answer 1

[Star Strider]

It would be easiest to concatenate your scalar variables into a matrix, then take the standard deviation of the matrix rows:

Smtx = [SL0, SL20, SL30; SR0, SR20, SR30; V0, V20, V30]; 
Ssd = std(Smtx,[],2)

Here, Ssd(1) is the standard deviation of the x-values, Ssd(2) y-values, and Ssd(3) z-values.

If you only have the three sets of scalar values, this will work. If you have more data, or if your data are different, you need to change the code accordingly.