1- Results of OPA

The Orthogonal Projection Approach (OPA) is a self-modelling curve resolution method. OPA could be employed during process monitoring to obtain concentration profiles and/or pure spectra of a mixture.
The two main results that are therefore interesting are the concentration profiles and the pure spectra.
In the Results menu of OPA, they are denoted as Mode 1 and Mode 2. Only 1D plots are available since 2D plots are more difficult to interpret and consequently not really useful.



Are available for instance:
Concentration profiles, Pure spectra, the mean spectrum of the original data matrix,...

The Model of the data matrix is also a graphical output of the result of OPA.
The submenu "Individual samples" calls a new window to choose which sample the user want to see the model.



The model can be seen in 2D for each "individual sample" or in 3D (landscape view) for the complete original data matrix (submenu "All samples")

Residuals can be seen for both individual samples or the complete matrix (same principle as for "Model")

The Results Menu can be improved according to comments and remarks of users.