R语言lattice绘图显示layout错误

Question

来自慕课网《R语言之数据可视化》课程3-6代码如下set.seed(1)x <- rnorm(100)f <- rep(0:1, each = 50)y <- x + f - f*x + rnorm(100, sd = 0.5)f <- factor(f, labels = c("Group1", "Group2"))xyplot(y~x | f, layout(2,1))之后显示错误，错误代码：Error in layout(2, 1) : layout matrix must contain at least one referenceto each of the values {1 ... 2}而课程视频里面的老师用这个代码就没有问题，不知道我这里问题出在哪里，希望指教！

Answer 1

已经知道原因，我没有抄对。layout(2,1)应该是layout=c(2,1)