ComputeFSSE
>Psychtoolbox>PsychGamma
rmse = ComputeFSSE(data,predict)
Compute a root fractional SSE between data and prediction.
Inputs should be column vectors.
Actual code is:
  diff = predict-data;
  rmse = sqrt((diff’*diff)/(data’*data));
7/9/14  dhb  Wrote this.  Will replace calls to old and badly named ComputeRMSE 
             with calls to this.  This does what ComputeRMSE did, but the
             bad name of ComputeRMSE was bugging me too much.
  Path   Retrieve current version from GitHub | View changelog
Psychtoolbox/PsychGamma/ComputeFSSE.m