从data.frame到矩阵

Question

我对R知道；我有8个变量（列）和587632个观察值（行）的数据结构。

AggregateActivities <- data.frame(sleep, eating, personalcare, cooking, houseclean, laundry, ironing, travel)

我想将AggregateActivities数据帧转换为矩阵，例如

dat <- matrix(c( values from AggregateActivities)  nrow=587632, ncol=8, byrow=TRUE)

有人可以帮我这个忙吗

Answer 1

只需更改此：

AggregateActivities <- data.frame(sleep, eating, personalcare)

为此：

AggregateActivities <- matrix(data.frame(sleep, eating, personalcare))

Answer 2

data.matrix函数是专门为此目的而构建的>

AggMat <- data.matrix( AggregateActivities )