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當使用GA軟件包運行遺傳算法時,我收到「缺少需要TRUE/FALSE的值」錯誤。在下面我的代碼,like
是用於健身的功能和X
是長度的數值向量6.「遺漏值,其中爲TRUE/FALSE需要」GA包中的錯誤
library(GA)
y<-c(46,38,49,55)
W<-matrix(c(0,1,0,0,1,0,0,0,0,0,0,1,0,0,1,0),ncol=4)
ei<-eigen(W)$values
data<- matrix(c(14691,14150,14607,15140,5337,5386,5207,5178),ncol=2)
like=function(x)
{
co<-c(x[2],x[3])
e<-x[4]*W%*%y-data%*%co-x[1]
L<-30*log(2)-15*log(2*pi)+log(prod(1-x[4]*Re(ei)))-15*log(x[5])+sum(log(pnorm(-x[6]*e/sqrt(x[5]))))
-0.5/x[5]*t(e)%*%e
return(L)
}
GA <- ga(type = "real-valued",
fitness = like,
min=c(-100,0,-50,-10,0.001,0),
max=c(100,100,0,10,100,10),
popSize = 100, maxiter = 200,
optim = TRUE)
結果和錯誤是如下:
GA | iter = 1
Mean = -Inf | Best = -2.870387
Error in if (fmin > (sfactor * fave - fmax)/(sfactor - 1)) { :
missing value where TRUE/FALSE needed
我改變sqrt(x [5])與一個新的x [5]在定義函數like和它的作品。我認爲負無窮是由log(0)引起的。感謝你的幫助。 – ShuangXin