Hi Jim
The objective function is passed to san_res where we have defined the 4
parameters of gbm and the values are initialized in san_res.
The output variable price has only three values: 0, 1, 2 (like categorical
values), so someone told me try to remove the log10 from the price.
I am not sure what to do, I spent two days but did not fix this issue.
On Sun, Dec 22, 2019 at 11:22 PM Jim Lemon <drjimle...@gmail.com> wrote:
> Hi Neha,
> The error message looks suspicious, as it refers to "all the MAEs"
> while there is only one NA value in the summary. I would carefully
> check the object that you are passing to san_res.
>
> Jim
>
> On Mon, Dec 23, 2019 at 4:17 AM Neha gupta <neha.bologn...@gmail.com>
> wrote:
> >
> > I am using the following code to tune the 4 parameters of Gradient
> Boosting
> > algorithm using Simulated annealing (optim). When I run the program,
> after
> > few seconds it stops and displays the following error:
> >
> > I point out here that the same code works for RF ( mtry parameter) and
> SVM
> > (cost and sigma parameters). So, I guess the problem should be in the 4
> > parameters of GBM
> >
> > Something is wrong; all the MAE metric values are missing:
> > RMSE Rsquared MAE
> > Min. : NA Min. : NA Min. : NA
> > 1st Qu.: NA 1st Qu.: NA 1st Qu.: NA
> > Median : NA Median : NA Median : NA
> > Mean :NaN Mean :NaN Mean :NaN
> > 3rd Qu.: NA 3rd Qu.: NA 3rd Qu.: NA
> > Max. : NA Max. : NA Max. : NA
> > NA's :1 NA's :1 NA's :1
> >
>
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