I am trying to predict future sale of a product by using holt-winters
nextsalesf contains the forecast for next 5 periods
val$Qty.2011001FBL0010250 is the known values of next 5 periods
I am trying to check the accuracy by first predicting
known next 5 period and cross checking by passing them both to the
question: are there any methods to make the model more accurate?
should the testing set error be lesser than training set error?
do these results mean my model is good or bad?
accuracy(nextSalesf,val$Qty.2011001FBL0010250) ME RMSE MAE MPE MAPE MASE Training set -179.0021 727.3155 426.2962 NaN Inf 0.6566237 Test set 11881.9135 11881.9135 11881.9135 101.9032 101.9032 18.3017010 ACF1 Training set -0.1586471 Test set NA