[R] all the MAE metric values are missing (Error message)

[Jim Lemon]

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.bologna90 using 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
>