是否将索引表转换为字符矩阵(或df)?在R
我总是犯奇怪的错误。这个逻辑在我看来是合理的。你能看看下面的代码并提供一些见解吗?谢谢是否将索引表转换为字符矩阵(或df)?在R,r,matrix,indexing,R,Matrix,Indexing,我总是犯奇怪的错误。这个逻辑在我看来是合理的。你能看看下面的代码并提供一些见解吗?谢谢 rw <- c(1,1,1,2,2,2,3,3,3) cl <- c(1,2,3,1,2,3,1,2,3) ch <- c("A","bv","c","dog","cat","bird","red", "yel","fuscia") df <- data.frame(rw, cl, ch) df l
rw <- c(1,1,1,2,2,2,3,3,3)
cl <- c(1,2,3,1,2,3,1,2,3)
ch <- c("A","bv","c","dog","cat","bird","red", "yel","fuscia")
df <- data.frame(rw, cl, ch)
df
layout <- matrix(NA, nrow=3, ncol=3)
layout[df[,1:2]] <- df[,3]
rw按照您原来的计划,矩阵索引需要一个矩阵
,而不是数据框架
layout[as.matrix(df[,1:2])] <- as.character(df[,3])
layout[as.matrix(df[,1:2])]成功!非常感谢。
layout[as.matrix(df[,1:2])] <- as.character(df[,3])