Description Usage Arguments Details Value References Examples
Fits a quantile regression SVM based on the Pinball Loss
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x |
An n X m matrix containing the predictors (n= number of observatiosn, m = number of predictors) . |
y |
The Response onto which the qrsvm shall be fitted |
kernel |
a string giving the type of kernels from package kernlab to use f.e. "rbfdot" for Radial Basis Function Kernel. All Kernels except "stringdot" supported. |
cost |
The Cost parameter see f.e. package "e1071" and "kernlab" |
tau |
The Quantile that shall be estimated. 0<=tau<=1 |
sigma |
A possible tuning parameter for specific Kernelfunctions, see package kernlab. |
degree |
A possible tuning parameter for specific Kernelfunctions, see package kernlab. |
scale |
A possible tuning parameter for specific Kernelfunctions, see package kernlab. |
offset |
A possible tuning parameter for specific Kernelfunctions, see package kernlab. |
order |
A possible tuning parameter for specific Kernelfunctions, see package kernlab. |
There is no preimplemented scaling of the input variables which should be considered beforehand. Also optimization is based on "quadprog:solve.QP" function which can be considerably slow compared to other SVM implementations.
An object of class "qrsvm"
"Nonparametric Quantile Regression" by I.Takeuchi, Q.V. Le, T. Sears, A.J. Smola (2004)
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