我正在使用hybridForecast R软件包,而且我不确定我做错了什么来获得负面预测:
示例:
library("forecastHybrid")
hits=c(1969,2552,3407,3768,1302,2988,3760,2822,3012,2945,2979,3180,4421)
model <- hybridModel(y = hits)
fc <- forecast(model, h = 1)
plot(fc)
upper <- as.numeric(fc[["upper"]][1, 2]) #5107
lower <- as.numeric(fc[["lower"]][1, 2])# -24198
baseline <- as.numeric(fc["mean"][[1]]) # -2143
是否存在负面预测的原因?