I would like to extract x,y,z coordinates of any 3 atoms from a pdb file. How to rectify this error and make it generalized?

ubq=getpdb('1UBQ');
for n=[1,2,3]
    Q(n)=[ubq.Model.Atom(n).X, ubq.Model.Atom(n).Y, ubq.Model.Atom(n).Z]
end 

Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.

Answer 1

[Walter Roberson]

 % N = range of indices for example 
  N=1:7;
  Q = [ubq.Model.Atom(N).X; ubq.Model.Atom(N).Y; ubq.Model.Atom(n).Z].';

This assumes that each X Y Z are scalars.

This code process an array with 3 columns. If 3 rows are acceptable then leave out the .'

[Masha]

Thank you!