NEWS/ChangeLog for hydroPSO
--------------------------

0.1-56	14-Jun-2012
        o 'hydroPSO'    : -) much less memory consumption for large values of 'maxit' and/or 'npart'.
                             The files 'BestParamPerIter.txt', 'PbestPerIter.txt', 'LocalBestPerIter.txt', 'Velocities.txt' are now written at the end of 
                             each iteration, and not at the end of the main algorithm (so the corresponding local variables were removed)
                          -) the convergence of the algorithm controlled by 'reltol' is now defined by : abs(reltol) <= abs(best.pbest[iter] - best.pbest[iter-1]), 
                             instead of reltol <= [ gbest(iter) / ( gbest(iter-1) +reltol ) ]
                          -) 'PbestPerIter.txt' output file: now it has an additional first column labelled "Iter", with the iteration number
                          -) 'LocalBestPartPerIter.txt' output file: now it has an additional first column labelled "Iter", with the iteration number
                          -) 'BestParamPerIter.txt' output file: now it has an additional first column labelled "Iter", with the iteration number.
                             The column with the goodness-of-fit measure ('GoF') was changed from the last position to the second one 
                             (just after the new 'Iter' column)
                          -) minor change: 'gbest.fit.prior' is now initialized in 'gbest.fit' instead of 'gbest.fit + 10*reltol'
        o 'plot_results': -) 'drty.out' is now checked for existence before reading the results.
        o  Specific version numbers were added for the following suggested packages: 
           hydroGOF(>=0.3-3), hydroTSM(>= 0.3-0), zoo(>=1.7-2), xts(>=0.8-2)
               

0.1-55	11-May-2012
        o 'hydromod'     : -) 'sim' and 'obs' are now checked for time attributes when 'gof.Ini' and/or 'gof.Fin' is/are used 
                              (thanks to M. Leh for reporting !)
        o 'hydroPSO'     : -) fixed bug originated when 'gof.Ini' and/or 'gof.Fin' was/were not given as parameters for .model.FUN.args. 
                              (thanks to M. Leh for reporting !)
                               This bug originated the following error during the run of the model with the best parameter set:
                              "Error in as.Date.default(model.FUN.args[["gof.Ini"]]) : do not know how to convert 'model.FUN.args[["gof.Ini"]]' to class "Date" "
        o 'plot_results' : the default value for 'ftype' was changed from "dm" to "o", to avoid problems with time series with a resolution 
                           coarser than daily
        o 'plot_out'     : the default value for 'ftype' was changed from "dm" to "o", to avoid problems with time series with a resolution 
                           coarser than daily
                             
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# Previous Releases: see old file 'ChangeLog' for details #
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0.1-54  01-Apr-2012
0.1.53  23-Mar-2012
0.1.52  09-Mar-2012
0.1.51  24-Feb-2012
0.1.50  23-Feb-2012
0.1.49  13-Feb-2012
0.1.48  22-Jan-2012
0.1.47  16-Jan-2012
0.1.46  29-Nov-2011
0.1-45  11-Nov-2011
0.1-44  28-Oct-2011
0.1-43  17-Oct-2011
0.1-42  08-Oct-2011
0.1-41  05-Sep-2011  
0.1-40  01-Sep-2011  
        24-Jun-2011 
           May-2011
           Apr-2011
        29-Dec-2010 
        23-Dec-2010
           Dec-2010
           Nov-2010
       2009-Oct2010: hydroPSO hibernation :(
          ~Jul-2008: hydroPSO beginning...
