problem with tune.svm

rng <- list(gamma = 2^(-1:1), cost = 2^(2:4))
rng
$gamma
[1] 0.5 1.0 2.0

$cost
[1]  4  8 16

obj <- tune.svm(pIC50 ~ ., data = data, ranges = rng)
Error in tune(svm, train.x = x, data = data, ranges = ranges, ...) :
        formal argument "ranges" matched by multiple actual arguments
The function `tune.svm' has no `range' argument, use `gamma' and `cost'
separately. The idea is to make `tune.foo' a `vectorized' function of
`foo' in the parameters. If you want to preconstruct a list, use

tune(svmobj, ranges = ...)

instead.

g.,
-d
Ay idea why ???

Ryszard

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