Change the crystal lattice and orientation of an sqw object or array of objects Most commonly: >> wout = change_crystal (w, rlu_corr) % change lattice parameters and orientation OR >> wout = change_crystal (w, alatt) % change just length of lattice vectors >> wout = change_crystal (w, alatt, angdeg) % change all lattice parameters >> wout = change_crystal (w, alatt, angdeg, rotmat) % change lattice parameters and orientation >> wout = change_crystal (w, alatt, angdeg, u, v) % change lattice parameters and redefine u, v Input: ----- w Input sqw object rlu_corr Matrix to convert notional rlu in the current crystal lattice to the rlu in the the new crystal lattice together with any re-orientation of the crystal. The matrix is defined by the matrix: qhkl(i) = rlu_corr(i,j) * qhkl_0(j) This matrix can be obtained from refining the lattice and orientation with the function refine_crystal (type >> help refine_crystal for more details). *OR* alatt New lattice parameters [a,b,c] (Angstroms) angdeg New lattice angles [alf,bet,gam] (degrees) rotmat Rotation matrix that relates crystal Cartesian coordinate frame of the new lattice as a rotation of the current crystal frame. Orthonormal coordinates in the two frames are related by v_new(i)= rotmat(i,j)*v_current(j) u, v Redefine the two vectors that were used to determine the scattering plane These are the vectors at whatever misorientation angles dpsi, gl, gs (which cannot be changed). Output: ------- wout Output sqw object with changed crystal lattice parameters and orientation NOTE The input data set(s) can be reset to their original orientation by inverting the input data e.g. - call with inv(rlu_corr) - call with the original alatt, angdeg, u and v % Overloaded methods: sqw/change_crystal sqw/change_crystal d4d/change_crystal d3d/change_crystal d2d/change_crystal d1d/change_crystal d0d/change_crystal

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