search for: yellowston

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2002 Nov 06
1
predict.rpart and large datasets
...dataset (say 100,000 records) within Splus: Terminating S Session: Signal: bad address signal Has anyone run into this error, discovered a work-around, etc.? More generally, I'm trying to use predict.rpart to generate predictions from very large, geographic datasets (we're talking all of Yellowstone National Park, on the order of 20 million pixels). Has anyone come up with a reasonable method to process big datasets using predict.rpart? I've been experimenting with a C program that sequentially calls predict.rpart to process smaller subsets of a large dataset using the call_S() Splus fun...
2005 May 25
0
mexican hat wavelet?
I would like to analyze a 2D array using a mexican hat wavelet of fixed scale. Couldn't find any mention of this wavelet on the help archives. Is one available? Thanks in advance, Alan Swanson Yellowstone Ecological Research Center [[alternative HTML version deleted]]