@Alfredo
The X is removed, but the reordering does not work:
> colnames(df)[1] <- "Mass"
> columnNames <- colnames(df)
> colnames(df)
[1] "Mass" "X1" "X10" "X11" "X12" "X13" "X14" "X15" "X16"
"X17" "X18" "X19" "X2" "X20" "X3" "X4" "X5" "X6" "X7"
"X8" "X9"
>
> colnames(df) <- gsub("X","",colnames(df))
> colnames(df)
[1] "Mass" "1" "10" "11" "12" "13" "14" "15" "16"
"17" "18" "19" "2" "20" "3" "4" "5" "6" "7"
"8" "9"
>
> df <- df[,colnames(df)]
> colnames(df)
[1] "Mass" "1" "10" "11" "12" "13" "14" "15" "16"
"17" "18" "19" "2" "20" "3" "4" "5" "6" "7"
"8" "9"
Best,
Joel
>>> Alfredo Alessandrini <caveneb...@gmail.com> 17-02-2012 14:40 >>>
Hi Joel,
to replace the colnames:
colnames(dataframe <- )gsub("X","",colnames(dataframe))
to order by colnames:
dataframe <- dataframe[,colnames(dataframe)]
Alfredo
2012/2/17 Joel Fürstenberg-Hägg <jo...@life.ku.dk>
Dear all,
I have a data frame in which the columns need to be ordered. The first
column X is at the right position, but the remaining columns X1-Xn
should be ordered like this: X1, X2, X3 etc instead of like below.
> colnames(pos1)
[1] "X" "X1" "X10" "X11" "X12" "X13" "X14" "X15" "X16" "X17" "X18"
"X19" "X2" "X20" "X3" "X4" "X5" "X6" "X7" "X8" "X9"
> pos1[1:5,1:5]
X X1 X10 X11 X12
1 100.5 7949.469 18509.064 8484.969 17401.056
2 101.5 3080.058 7794.691 3211.323 8211.058
3 102.5 1854.347 4347.571 1783.846 4827.338
4 103.5 2064.441 8421.746 2012.536 8363.785
5 104.5 9650.402 26637.926 10730.647 27053.421
I am trying to first change the first column name to something without
an X and save as a vector. I would then remove the X from each position
use the vector for renaming the columns. Then the column 2-n could be
ordered, I hope...
colnames(pos)[1] <- "Mass"
columnNames <- colnames(pos)
Does any of you have an idea how to do this, or perhaps there is a
smoother solution?
Would it be easier to solve it if the contents of the first column were
extracted and used as row names instead?
Best regards,
Joel
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