Multiply each column of a data frame by the corresponding value of a vector [duplicate]

Question

I have the following data frame and vector:

dframe <- as.data.frame(matrix(1:9,3))
vector <- c(2,3,4)

I would like to multiply each column of dframe by the corresponding value of vector. This won't do:

> vector * dframe
  V1 V2 V3
1  2  8 14
2  6 15 24
3 12 24 36 

each row of dframe is multiplied by the corresponding value of vector, not each column. Is there any idiomatic solution, or am I stuck with a for cycle?

Answer 1

Here is another option using sweep

sweep(dframe, 2, vector, "*")
#  V1 V2 V3
#1  2 12 28
#2  4 15 32
#3  6 18 36

---

Or using col

dframe*vector[col(dframe)]