Convert a row of a data frame to vector
dataframe, r, vector
Solution
When you extract a single row from a data frame you get a one-row data frame. Convert it to a numeric vector:
as.numeric(df[1,])
As @Roland suggests, `unlist(df[1,])` will convert the one-row data frame to a numeric vector without dropping the names. Therefore `unname(unlist(df[1,]))` is another, slightly more explicit way to get to the same result.
As @Josh comments below, if you have a not-completely-numeric (alphabetic, factor, mixed ...) data frame, you need `as.character(df[1,])` instead.
Problem
I want to create a vector out of a row of a data frame. But I don't want to have to row and column names. I tried several things... but had no luck. This is my data frame: ``` > df <- data.frame(a=c(1,2,4,2),b=c(2,6,2,1),c=c(2.6,8.2,7.5,3)) > df a b c 1 1 2 2.6 2 2 6 8.2 3 4 2 7.5 4 2 1 3.0 ``` I tried: ``` > newV <- as.vector(df[1,]) > newV a b c 1 1 2 2.6 ``` But I really want something looking like this: ``` > newV <- c( 1,2,2.6) > newV [1] 1.0 2.0 2.6 ```