On Aug 22, 2012, at 10:24 AM, Paula Cafeld wrote:
Hi all,
please excuse- I'm a complete newbie to R, so it's possible my
question was asked a thousand times before, but I don't get it :-(
I imported a CSV file via:
x=read.csv("test.csv",header=TRUE,sep="\t")
In a column there are values with the dot-character (".") I want to
replace with a commata:
You should NOT be trying to do that. R will not recognize such values
as proper numeric values. If you had such values in a text file you
could be using read.csv2 to read them, but once inside R, they will
get displayed with periods. write.table() has a 'dec' argument that
lets you write out results in your preferred format. There are many
options for changing the way the R behaves, but I do not believe that
changing the decimal-point symbol is one of them. Trying typing and
read this:
names(options())
?options
David Winsemius, MD
Alameda, CA, USA
x[9]
V16
1 GPS LATITUDE
2 53.51982466427600
3 51.520379571037000
4 53.520745152837800
5 51.521750487103766
6 53.52067987059652
7 53.519504773664345
8 51.51861690180330
9 51.519100010776675
10 51.51905431150669
11 51.5193415632712
12 53.51927627894419
13 51.52073862461807
14 50.51989647613406
15 50.51789875702557
16 50.52051666456883
So I tried:
cat(gsub(".",",",x[9],fixed=T))
which outputs:
c(111, 79, 81, 85, 87, 83, 78, 72, 75, 74, 77, 76, 84, 80, 70, 82,
112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 98, 95, 105, 92, 89, 94, 101, 103,
104, 107, 106, 108, 109, 110, 1, 1, 1, 100, 99, 102, 97, 96, 93, 91,
90, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 16, 23, 25, 21, 22,
19, 20, 24, 17, 14, 15, 18, 1, 26, 28, 27, 30, 29, 32, 34, 39, 54,
57, 73, 44, 42, 56, 53, 49, 63, 52, 45, 55, 1, 1, 1, 1, 1, 65, 51,
61, 59, 86, 31, 67, 60, 35, 41, 38, 40, 33, 37, 36, 43, 62, 58, 64,
68, 69, 66, 50, 47, 71, 46,
48, 1, 1, 1, 1, 1, 13, 12, 11, 11, 7, 1, 1, 8, 9, 1, 4, 2, 5, 6, 1,
1, 1, 10, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1)
The values in the column are still unchanged. What have I to do that
the dot will be replaced with the commata?
Thanks in advanced
Paula
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