[R] Error in optim while using fitdistr() function
Jason Q. McClintic
jqmcclintic at stthomas.edu
Sun Feb 10 16:15:15 CET 2008
I get the digest, so I apologize if this is a little late.
For your situation (based on the description and what I think your code
is doing, more on that below), it looks like you are modeling a Poisson
flow where the number of hits per unit time is a random integer with
some mean value.
If I understand your code correctly, you are trying to put your data
into k bins of width f<-(max(V1)-min(V1))/k. In that case I would think
something like this would work more efficiently:
m<-min(V1);
k<-floor(1 + log2(length(V1)));
f<-(max(V1)-min(V1))/k;
binCount<-NULL;
for(i in seq(length=k)){
binIndex<-which((m+(i-1)*f<V1)&(V1<m+i*f));
binCount[i]<-sum(V2[binIndex]);
};
where i becomes the index of time intervals.
Hope it helps.
Sincerely,
Jason Q. McClintic
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