我在R中遇到一个错误，试图用新数据预测囊模型。我使用以下代码：
# I've fitted a sac model and now I'm trying to predict for a new dataset:
>newdata = read.csv("location" , header=T , sep=",")
#Calculate the new matrix from this new data:
>cord <- coordinates(newdata[,c("X","Y")])
>k1 <- knn2nb(knearneigh(cord, k=5))
>all.linked <- max(unlist(nbdists(k1, cord)))
>d <- dnearneigh(cord, 0, all.linked)
>dlist <- nbdists(d, coordinates(cord))
>wn = nb2listw(d, glist=dlist, style="W")
#predict:
>prediction = predict.sarlm(sac_model, newdata = newdata, pred.type = "TC", wn )
出现问题的地方：
mat2listw中的错误（W，row.names = region.id，style = style）：给定的非唯一row.names
老实说，我无法看到代码中的错误在哪里。