## ----global_options, include=FALSE--------------------------------------------
knitr::opts_chunk$set(fig.width=5, fig.height=5, warning=FALSE, cache = F)

## ----echo = F, message = F----------------------------------------------------
set.seed(123)

## ----eval = F-----------------------------------------------------------------
# runMyModel(par)

## ----eval = F-----------------------------------------------------------------
# dyn.load(model)
# 
# runMyModel(par){
#   out = # model call here
#   # process out
#   return(out)
# }

## ----eval = F-----------------------------------------------------------------
# runMyModel(par){
# 
#   # Create here a string with what you would write to call the model from the command line
#   systemCall <- paste("model.exe", par[1], par[2])
# 
#   out = system(systemCall,  intern = TRUE) # intern indicates whether to capture the output of the command as an R character vector
# 
#   # write here to convert out in the apprpriate R classes
# 
# }

## ----eval = F-----------------------------------------------------------------
# runMyModel(par, returnData = NULL){
# 
#   writeParameters(par)
# 
#   system("Model.exe")
# 
#   if(! is.null(returnData)) return(readData(returnData)) # The readData function will be defined later
# 
# }
# 
# writeParameters(par){
# 
#   # e.g.
#   # read template parameter fil
#   # replace strings in template file
#   # write parameter file
# }

## ----eval = F-----------------------------------------------------------------
# setUpModel <- function(parameterTemplate, site, localConditions){
# 
#   # create the runModel, readData functions (see later) here
# 
#   return(list(runModel, readData))
# 
# }

## ----eval = F-----------------------------------------------------------------
# getData(type = X){
# 
#   read.csv(xxx)
# 
#   # do some transformation
# 
#   # return data in desidered format
# }

## ----eval = F-----------------------------------------------------------------
# par = c(1,2,3,4 ..)
# 
# runMyModel(par)
# 
# output <- getData(type = DesiredType)
# 
# plot(output)

## -----------------------------------------------------------------------------
mymodel<-function(x){
  output<-0.2*x+0.1^x
  return(output)
}

## ----eval = F-----------------------------------------------------------------
# 
# library(parallel)
# cl <- makeCluster(2)
# 
# runParallel<- function(parList){
#   parSapply(cl, parList, mymodel)
# }
# 
# runParallel(c(1,2))

## ----eval = F-----------------------------------------------------------------
# library(BayesianTools)
# parModel <- generateParallelExecuter(mymodel)

## -----------------------------------------------------------------------------
library(BayesianTools)

ll <- generateTestDensityMultiNormal(sigma = "no correlation")
bayesianSetup <- createBayesianSetup(likelihood = ll, lower = rep(-10, 3), upper = rep(10, 3))

settings = list(iterations = 200)

# run the several MCMCs chains either in seperate R sessions, or via R parallel packages
out1 <- runMCMC(bayesianSetup = bayesianSetup, sampler = "DEzs", settings = settings)
out2 <- runMCMC(bayesianSetup = bayesianSetup, sampler = "DEzs", settings = settings)

res <- createMcmcSamplerList(list(out1, out2))
plot(res)