From: chirine wolley <wolley.chirine_at_hotmail.com>

Date: Tue, 12 Apr 2011 12:02:51 +0200

res2=matrix(0,nrow=nrow(X),ncol=ncol(Y)) for (i in 1:nrow(X))

*{
*

res1[i]=log(1/(1+exp(-t(x1)%*%X[i,]-x2))) for (t in 1:ncol(Y))

{

res2[i,t]=log(((1+exp(-t(x3[,t])%*%X[i,]-x4[t]))/(sqrt(2*pi)))* (exp(-0.5*((1+exp(-t(x3[,t])%*%X[i,]-x4[t]))*(1-Y[i,t]))^(2)))) }

}

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Tue 12 Apr 2011 - 10:24:26 GMT

Date: Tue, 12 Apr 2011 12:02:51 +0200

x1 = x[1:ncol(X)] # 1st parameter x1 is a vector x2 = x[ncol(X)+1] # 2nd parameter x2 is real x3 = x(0,166,5) # 3rd parameter is a matrix ----> How should one write it ??? x4 = x[ncol(X)+1:ncol(X)+1+ncol(Y)] #4th paramater is a vectorres1=rep(0,nrow(X))

res2=matrix(0,nrow=nrow(X),ncol=ncol(Y)) for (i in 1:nrow(X))

res1[i]=log(1/(1+exp(-t(x1)%*%X[i,]-x2))) for (t in 1:ncol(Y))

{

res2[i,t]=log(((1+exp(-t(x3[,t])%*%X[i,]-x4[t]))/(sqrt(2*pi)))* (exp(-0.5*((1+exp(-t(x3[,t])%*%X[i,]-x4[t]))*(1-Y[i,t]))^(2)))) }

}

sum(res1)+sum(res2) # the function to minimize}

opt=optim(c(alpha[,c+1],beta[c+1],w,gamma),g) ### and how can we call optim ???

Thank you in advance!

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