MATLAB: Plot different classes in different colors

plottwo different classes in the same figure

I' m doing a pca and I want make a general function to plot two different classes in different colors( blue square, red circle) in the same figure and i want to use this funtion in any other experiment
Resuming: for the data above, the values of class 1 must be in different color in the class 2 in the same figure
for example
 Var1     Var2    Var*n*   Class
  2.3     0.22    12         1  
  2.4     0.23    11         1 
  2.8     0.21    15         2
  2.1     0.21    16         1
  2.9     0.23    14         2
Best regards Rafael

Best Answer

class1 = V(:,4) == 1;
plot3(V(class1,1), V(class1,2), V(class1,3), 'bs.');
hold on
plot3(V(~class1,1), V(~class1,2), V(~class1,3), 'ro.');
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