Amelia algorithm
On Mon, Jan 7, 2013 at 4:29 PM, Martin <Lhopm at gmx.net> wrote:
Dear all. First of all, my english isn't verry good, but I hope I can convey my concern. I've a general question about the Amelia algorithm. I'm no mathematician or statistician, but I had to use R and impute and analyse some data, and Amelia showed results that fitted my expectations. I'll have to defend my choice soon, but I haven't totally grasped what Amelia does. I'm particularly interested in a simple as possible explanation in how Amelia imputation works. I've read that it uses a bootstrapping-based algorithm, but how does it chose the values? The data had mainly value >0 (chemical concentrations, water temperature and pH-value). Regards Martin
I'm pretty new here, but a quick google search suggests that perhaps http://gking.harvard.edu/amelia (and maybe google translate) might have some decent pointers for you. I poked at the documentation from that site (a pdf file), and it's quite intense on the mathematics, you may get more from it than I could. there's also a link there to a separate, for thisspecific package/algorithm (it seems to be called Amel ia II, I'm assuming this is the same that you used, if I'm off .. sorry about that) HTH
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