我正在尝试计算和绘制本系列未来两年的预测。seasonal=list(order=c(0,1,1),period=4))
plot(Amodel,n1=c(1978,1),n.ahead=8,pch=19,ylab='Log(Earnings)') 但Rstudio表明,Error in xy.coords(x, y, xlabel, ylabel, log) : 'x' is a list, but does not have componen
=laea +lat_0=52 +lon_0=10 +x_0=4321000 +y_0=3210000 +ellps=GRS80 +units=m +no_defs Error in xy.coords(x, y, xlabel, ylabel, log) :
'x' isa list, but does not have components '