Add usage example to GoniometerAnglesFromPhiRotation re #9726

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>

Code/Mantid/docs/source/algorithms/GoniometerAnglesFromPhiRotation-v1.rst

@@ -17,4 +17,28 @@ only in their phi rotation.
 If the phi angles are known, this algorithm attempts to find the common
 chi and omega rotations.
 
+Usage
+-----
+
+.. testcode:: exGoniometerAnglesFromPhiRotation 
+
+   # Load Peaks found in SXD23767.raw 
+   ws1 =Load(Filename='SXD23767.peaks')
+   ws2 = ws1.clone()
+
+   #Set orientated lattice
+   ublist = [-0.06452276,  0.2478114,  -0.23742194, 0.29161678, -0.00914316, -0.12523779, 0.06958942, -0.1802702,  -0.14649001]
+   SetUB(Workspace=ws1,UB=ublist)
+
+   # Run Algorithm 
+   result = GoniometerAnglesFromPhiRotation(ws1,ws2,Tolerance=0.5,MIND=0,MAXD=2)
+
+   print "Chi: %.1f, Omega: %.1f, Indexed: %i, AvErrIndex: %.4f AvErrAll: %.4f" % (  result[0], result[1], result[2], result[3], result[4] )
+
+Output:
+
+.. testoutput:: exGoniometerAnglesFromPhiRotation
+
+   Chi: 90.0, Omega: 90.0, Indexed: 300, AvErrIndex: 0.2114 AvErrAll: 0.2114
+
 .. categories::