convert a row of a data frame to a simple vector in R

Question

I have a huge data frame from which I only select a couple of rows. Then I remove some of the columns based on a condition. let us say that I choose row 4460 as shown bellow

Answer 1

Example from mtcars data

mydata<-mtcars
k<-mydata[1,]
          mpg cyl disp  hp drat   wt  qsec vs am gear carb
Mazda RX4  21   6  160 110  3.9 2.62 16.46  0  1    4    4
names(k)<-NULL

unlist(c(k))
 [1]  21.00   6.00 160.00 110.00   3.90   2.62  16.46   0.00   1.00   4.00   4.00

Updated as per @Ananda: unlist(mydata[1, ], use.names = FALSE)

Answer 2

Try to use row index.

e.q.

list <- yourdataframe[4460, ]

Answer 3

I think it's already a vector, only with names in each element (inherited from the data.frame).

    #random df
    DF = data.frame(col1 = sample(1:10, 10), col2 = sample(1:10,10), col3 = sample(1:10, 10))

    DF[5,]
      col1 col2 col3
    5    3    7    5

    mode(DF[5,]) 
    [1] "list"

    mode(unlist(DF[5,]))
    [1] "numeric"

    names(DF[5,])
    [1] "col1" "col2" "col3"

    sum(DF[5,]) # computations are naturally done
    [1] 15

To get rid of the names, nontheless, you could:

    unname(unlist(DF[5,]))
    [1] 3 7 5