这是我数据的前几行
> data
Price Time
1 116800 2008-03-01
2 117200 2008-04-01
3 125100 2008-05-01
4 125300 2008-06-01
5 128700 2008-07-01
6 132900 2008-08-01
7 133500 2008-09-01
8 133700 2008-10-01
9 122900 2008-11-01
我尝试将其作为时间序列进行操作并绘制我的二次模型，但失败了，这是我的代码：
t<-time(data$Time)
tsquare<-t^2
fit1<-lm(Price~t+tsquare,data=data)
plot(x=data$Time,y=data$Price,type="l",main="New Orleans House Price Trend S
ince 2008",xlab="Time",ylab = "Price")
lines(y=fit1$fitted.values,x=as.vector(t), type='l',col="red")
这是错误：
Error in plot.xy(xy.coords(x, y), type = type, ...) : plot.new has not been called yet
The code runs without error but there is no red line pops up
