hydroPSO: default value of the inertia weight 'IW' was changed from (linearly...

hydroPSO: default value of the inertia weight 'IW' was changed from (linearly decreasing) IW.w= c(1.2, 0.4) to 'IW.w=1/(2*log(2))'

NEWS

@@ -5,6 +5,7 @@ NEWS/ChangeLog for hydroPSO
         o 'hydroPSO'    : -) added '...' parameter. It is only used when 'fn' is different from "hydromod". This is only done for 'optim' compatibility.
                           -) fixed small bug related to improper PSO evolution when 'best.update'=="async" (NOT the default option !) 
                              AND (topology!="gbest" | method!="pso")
+                          -) default value of 'IW' was changed from (linearly decreasing) IW.w= c(1.2, 0.4) to 'IW.w=1/(2*log(2))'
                           -) source code was tidy up
                              
 0.1-56	14-Jun-2012

R/PSO_v2012.R

@@ -1390,7 +1390,7 @@ hydroPSO <- function(
 	    boundary.wall=c("reflecting", "damping", "absorbing", "invisible"),
 	    topology=c("random", "gbest", "lbest", "vonNeumann"), K=3, iter.ini=0, ngbest=4, # only used when 'method=ipso'   
 
-	    use.IW = TRUE, IW.type=c("linear", "non-linear", "runif", "aiwf", "GLratio"), IW.w= c(1.2, 0.4), IW.exp= 1, 
+	    use.IW = TRUE, IW.type=c("linear", "non-linear", "runif", "aiwf", "GLratio"), IW.w=1/(2*log(2)), IW.exp= 1, 
 	    use.TVc1= FALSE, TVc1.type=c("non-linear", "linear", "GLratio"), TVc1.rng= c(2.2, 1.8), TVc1.exp= 1.5, 
 	    use.TVc2= FALSE, TVc2.type=c("non-linear", "linear"), TVc2.rng= c(1.8, 2.2), TVc2.exp= 1.5, 
 	    use.TVlambda=FALSE, TVlambda.type=c("non-linear", "linear"), TVlambda.rng= c(0.9, .1), TVlambda.exp= 1.7,