Displaying 2 results from an estimated 2 matches for "paropt".
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aropt
2012 Jun 15
0
Syntax for nls optimization function
...t;-optim(par=c(parInit), fn=myFunction, method = c("L-BFGS-B"), lower =
parMin, upper = parMax,
control=list(trace=3,factr=iFactr,maxit=300),
parOpt=parOpt,parVal=parVal,objFun=iObjFun,dset=dHM1,whatPDM=whatPDMi)
Here "myFunction" is a function that provides the value of the sum of
squared error that is computed after a lot of computations. There are other
parameters and data (through a dataframe dHM1) that are supplied to
"myFu...
2007 Nov 30
2
finding roots (Max Like Est)
I have this maximum liklihood estimate problem
i need to find the roots of the following:
[sum (from i=1 to n) ] ((2(x[i]-parameter)/(1+(x[i]-parameter)^2))=0
given to me is the x vector which has length 100
how would I find the roots using R?
I have 2 thoughts...... 1 is using a grid search ... eg. brute force, just
choosing a whole bunch of different values for my parameter .... such as