Displaying 4 results from an estimated 4 matches for "daelen".
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daelej
2003 Dec 30
3
Writing data frames
...3.25 5.00
to a file, but the write.table call gives me an error:
Error in as.data.frame.default(x[[i]], optional = TRUE) :
can't coerce array into a data.frame
Can anyone tell me what the most convenient/flexible way is to write
data.frames?
Thanks - Ton
Ton van Daelen, PhD
Director, Application Support
Tel: (858) 279-8800 ext 217
Fax: (858) 279-8804
Web: www.scitegic.com
SciTegic Inc. - ask more of your data
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2004 Jan 19
1
Persistence for statistical models
Hi there -
Is there a way to write statistical models (trees, naïve Bayes, SVM, etc) to a file and import them again without loss of information?
Thanks - Ton
Ton van Daelen, PhD
Director, Application Support
Tel: (858) 279-8800 ext 217
Fax: (858) 279-8804
Web: www.scitegic.com
Register now for the 2004 Pipeline Pilot user group meeting Jan 28-30 in San Diego: http://www.scitegic.com/UGMSD2004/
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2005 Jan 20
2
Cross-validation accuracy in SVM
Hi all -
I am trying to tune an SVM model by optimizing the cross-validation
accuracy. Maximizing this value doesn't necessarily seem to minimize the
number of misclassifications. Can anyone tell me how the
cross-validation accuracy is defined? In the output below, for example,
cross-validation accuracy is 92.2%, while the number of correctly
classified samples is (1476+170)/(1476+170+4) =
2004 Dec 13
0
Problem tuning an SVM
Hi all -
(Re my previous question to the list, I managed to generate an ROC plot
for my SVM by ranking the data using the Decision.Values property.
Thanks for your responses)
I have now started tuning the SVM to get optimal parameters for the RBF
kernel and I ran into a problem. Whatever parameter ranges I specify, I
always get the same error values for all combinations of parameters it