Displaying 2 results from an estimated 2 matches for "insigthful".
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insightful
2003 Aug 07
2
Statistical analysis of huge datasets.
Dear R-users,
I am faced with the problem of analyzing a huge dataset (+ 2 million
records, +150 variables) which does not fit into memory. I would like to
know if there are pre-packaged tools (in the spirit of Insigthful
I-Miner, for instance) aimed at subsampling or splitting the dataset
into data-frameable subdatasets, applying functions record-wise, etc.
Thank you very much for your help.
Carlos J. Gil Bellosta
Sigma Consultores Estad?sticos
http://www.consultoresestadisticos.com
2009 Aug 10
1
manipulating text to generate different formulas to use in nls()
Hello,
In doing a series of non-linear estimations of a function which is a sum of a varying number
of sinusoids, I would like to "autogenerate" the arguments needed by nls() depending on that
number.
For example, when there are two sinusoids:
> nls( y ~ mu + A1 * cos(2*pi*f1*x - P1) + A2 * cos(2*pi*f2*x - P2), data = some.xy.data,
start = list( mu=some.value0,