Here is an approach that should work:
> x <- data.frame(a=1:10, b=1:10, c=1:10)
> # use sprintf to make consistent numbers
> myNames <- sprintf("%.2f", seq(from=-179, to=179, length=3))
> colnames(x) <- myNames
> x
-179.00 0.00 179.00
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4
5 5 5 5
6 6 6 6
7 7 7 7
8 8 8 8
9 9 9 9
10 10 10 10
>
On Fri, Jun 13, 2008 at 8:27 PM, Steve Murray <[EMAIL PROTECTED]> wrote:
>
> Dear all,
>
> I have a data frame of dimension 720 columns by 360 rows, to which I am
> trying to add numerical row and column labels to, using the 'sequence'
> command. The original data, which I read in using 'read.table', had no such
> labels at all.
>
> I've got as far as successfully using the sequence command and getting the
> labels to display. However, I'm finding that for the minus numbers in
> particular, the values aren't displaying correctly. For the value '-179.75'
> for example, it displays as 'X.179.75'. Even for positive numbers, the 'X'
> prefix appears at the start of the label (but without the '.').
>
> I have tried numerous attempts at addressing this. I'm currently as far as
> adopting the following approach; I'll show what I've done for just the column
> headings - I've adopted the same approach for row headings, with the same
> results/problem so far.
>
> columnnames <- seq(from = -179.75, to = 179.75, length = 720)
> as.numeric <- colnames(Jan)
> colnames(Jan) <- make.names(columnnames)
>
> N.B. 'Jan' (as in January) refers to the data frame in question.
>
> So my thinking here is to assign the values to be used as column labels to
> 'columnnames', and use 'make.names' to assign these values to the column
> names of the data frame. I've also tried changing 'colnames(Jan)' to be a
> numeric class, as I was previously having problems assigning the values to
> the labels - I think because by default 'colnames' is of class 'character
> vector'?
>
> If anyone is able to suggest a way how I can solve the problem of the values
> not being displayed as I'd hoped (namely, removing the 'X' and displaying '-'
> for minus numbers), then I'd be very grateful.
>
> Many thanks,
>
> Steve
>
> _________________________________________________________________
>
>
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>
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>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
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