从data.frame到矩阵

Question

I knew to R; I have a data fame with 8 variables (columns) and 587632 observation (rows).

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

I would like to convert AggregateActivities the data frame into a matrix such as

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

Can somebody help me wit this please

Answer 1

Just change this:

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

To This:

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

Answer 2

函数data.matrix是专门为此目的而构建的>

AggMat <- data.matrix( AggregateActivities )