gaBinaryTN {CellNOptR} | R Documentation

## Genetic algorithm for time point N

### Description

This is the genetic algorithm for time point N, that should follow optimisation based on time point 1.

Replaces gaBinaryT2 since verson 1.3.28

### Usage

    gaBinaryTN(CNOlist, model,  bStrings, sizeFac = 1e-04, NAFac = 1,
    popSize = 50, pMutation = 0.5, maxTime = 60, maxGens = 500,
    stallGenMax = 100, selPress = 1.2, elitism = 5, relTol = 0.1, verbose=TRUE,
    priorBitString=NULL, timeIndex = NULL)

### Arguments

`CNOlist` | a CNOlist on which the score is based (based on valueSignals[[3]], i.e. data at t2)
`model` | a model structure, as created by `readSIF`, normally pre-processed but that is not a requirement of this function
`bStrings` | the optimal bitstring from optimisation at time 1 (i.e. a vector of 0s and 1s)
`sizeFac` | the scaling factor for the size term in the objective function, default to 0.0001
`NAFac` | the scaling factor for the NA term in the objective function, default to 1
`popSize` | the population size for the genetic algorithm, default set to 50
`pMutation` | the mutation probability for the genetic algorithm, default set to 0.5
`maxTime` | the maximum optimisation time in seconds, default set to 60
`maxGens` | the maximum number of generations in the genetic algorithm, default set to 500
`stallGenMax` | the maximum number of stall generations in the genetic algorithm, default to 100
`selPress` | the selective pressure in the genetic algorithm, default set to 1.2
`elitism` | the number of best individuals that are propagated to the next generation in the gen. al. default set to 5
`relTol` | the relative tolerance for the best bitstring reported by the genetic algorithm, i.e.how different from the best solution can solutions be to be reported as well, default set to 0.1
`verbose` | logical (default to TRUE) do you want the statistics of each generation to be printed on the screen
`priorBitString` | A bitString of same length at the initial bitstring made of 0, 1 or NA. By default, this bitstring is set to NULL (equivalent to setting all bits to NA). If provided, all bitstring in a population will be changed to be in agreement with the priorBitString list.
`timeIndex` | todo

### Details

This function takes in the same input as the T1 ga, but in addition it takes in the bitstring optimised for T1, and does not take an initial bitstring. Be aware that the bitString that this function returns is one that only includes the bits that it actually looks at, i.e. the bits that were 0 in the bStringT1

### Value

This function returns a list with elements:

`bString` | the best bitstring
`results` | a matrix with columns "Generation","Best_score","Best_bitString","Stall_Generation","Avg_Score_Gen","Best_score_Gen","Best_bit_Gen","Iter_time"
`stringsTol` | the bitstrings whose scores are within the tolerance
`stringsTolScores` | the scores of the above-mentionned strings

### Author(s)

C.Terfve, T. Cokelaer

### See Also

getFit, simulatorT1, simulatorT2, gaBinaryT2

### Examples

    #load data

    data(CNOlistToy2,package="CellNOptR")
    data(ToyModel2,package="CellNOptR")

    #pre-process model

    checkSignals(CNOlistToy2,ToyModel2)
    model = preprocessing(CNOlistToy2, ToyModel2)

    #optimise t1
    ToyT1<-gaBinaryT1(
    	CNOlist=CNOlistToy2,
    	model=model,
    	maxGens=10,
    	popSize = 10,
    	verbose=FALSE)

    #Optimise T2

    ToyT2<-gaBinaryTN(
    	CNOlist=CNOlistToy2,
    	model=model,
    	bStrings=list(ToyT1$bString),
    	maxGens=10,
    	popSize = 10,
    	verbose=FALSE)

[Package CellNOptR version 1.33.0 Index]