Add a vector to a column of a dataframe
Solution 1
You need to convert c(2,3,4,5)
to a data frame then use rbind to join the rows as @Ananda Mahto did in his comment
df <- rbind(df, data.frame(bla = c(2,3,4,5)))
Where 'bla' is the name of the column in df
Solution 2
Another option if you know the final dimensions in advance is just to create an empty dataframe of the given size and then append rowwise:
blah <- data.frame(matrix(NA, nrow=N, ncol=M))
for (i in 1:N) {
yourResults <- yourFunction()
blah[i,] <- yourResults
}
tlorin
I'm a new comer at bio-informatics and as I found answers of basic questions on this forum I found it cool and thought that I should join this community! For the moment, I'm mostly asking questions, but I hope in the future I'll get to answer some! :)
Updated on July 09, 2022Comments
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tlorin almost 2 years
Sorry about this one but I can't find an easy solution to this.
I have a data frame:
>bla<-c(1) >df<-data.frame(bla) >df bla 1 1
I want to append values to the bottom of the column (hence not create a new one, as explained here). For instance, get:
bla 1 1 2 2 3 3 4 4 5 5
I tried:
df[2,1]<-c(2,3,4,5) df[,1]<-c(2,3,4,5)
but I get:
Error in `[<-.data.frame`(`*tmp*`, 2, 1, value = c(2, 3, 4, 5)) : replacement has 4 rows, data has 1
Maybe dataframes are not appropriate and I should try with matrixes instead? Any suggestion would be much appreciated! :)