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yanyachen / rBayesianOptimization

Bayesian Optimization of Hyperparameters
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Error in -"Round" : invalid argument to unary operator #6

Closed dfayzur closed 8 years ago

dfayzur commented 8 years ago

After running the following example given in the package, I receive "Error in -"Round" : invalid argument to unary operator". The operating system is Windows 7, and running R x64 3.3.1 in the system.

_# Example 1: Optimization

Test_Fun <- function(x) { list(Score = exp(-(x - 2)^2) + exp(-(x - 6)^2/10) + 1/ (x^2 + 1), Pred = 0) } OPT_Res <- BayesianOptimization(Test_Fun, bounds = list(x = c(1, 3)), init_points = 2, niter = 1, acq = "ucb", kappa = 2.576, eps = 0.0, verbose = TRUE)

dfayzur commented 8 years ago

OK, solved once I updated the data.table library to version 1.9.6 Previously, version 1.9.4 was installed to the computer. It would be nice to check data.table version at the time to install rBayesianOptimization

yanyachen commented 8 years ago

Yes, you are right. I didn't realize the "negative string indices" doesn't work for data.table version 1.9.4. I will leave this issue open until I add the version check to DESCRIPTION. Thank you very much.

yanyachen commented 8 years ago

Version check for data.table added