get the positions of the parameters to optimize for given Fixed
     
    
    LightResponseCurveFitter_getOptimizedParameterPositions(isUsingFixedVPD, 
    isUsingFixedAlpha)
 
     
    
    Arguments
    
- isUsingFixedVPD
 
boolean scalar: if TRUE,
VPD effect set to zero and is not optimized
 
  - isUsingFixedAlpha
 
boolean scalar: if TRUE,
initial slope is fixed and is not optimized
 
 
    
    Details
    If subclasses extend the parameter vector, they need
to override this method.
     
    
    Value
    integer vector of positions in parameter vector
     
    
    Author
    Department for Biogeochemical Integration at MPI-BGC, Jena, Germany <REddyProc-help@bgc-jena.mpg.de> [cph], Thomas Wutzler <twutz@bgc-jena.mpg.de> [aut, cre], Markus Reichstein <mreichstein@bgc-jena.mpg.de> [aut], Antje Maria Moffat <antje.moffat@bgc.mpg.de> [aut, trl], Olaf Menzer <omenzer@bgc-jena.mpg.de> [ctb], Mirco Migliavacca <mmiglia@bgc-jena.mpg.de> [aut], Kerstin Sickel <ksickel@bgc-jena.mpg.de> [ctb, trl], Ladislav <U+0160>igut <sigut.l@czechglobe.cz> [ctb]