Hello all,
I have a vector of character strings, in which I have letters, numbers, and
symbols. What I wish to do is obtain a vector of the same length with just the
numbers.
A quick example -
extract of the original vector :
lema, rb 2% rb 2% rb 3% rb 4% rb 3% rb 2%,mineuse rb rb rb 12
rb rj
Bonjour David,
What about one of these :
R gsub( [^[:digit:]], , x )
or using perl regular expressions:
R gsub( \\D, , x, perl = T )
Cheers,
Romain
GOUACHE David wrote:
Hello all,
I have a vector of character strings, in which I have letters, numbers, and
symbols. What I wish to do is
Is this what you want:
x
[1] lema, rb 2% rb 2% rb 3% rb 4%
rb 3% rb 2%,mineuse
[7] rbrbrb 12 rb
rj 30%rb
[13] rbrb 25%rbrb
rbrj, rb
gsub([^0-9]*([0-9]*)[^0-9]*, \\1, x)
[1] 2 2 3
GOUACHE David wrote:
Hello all,
I have a vector of character strings, in which I have letters, numbers,
and symbols. What I wish to do is obtain a vector of the same length with
just the numbers.
A quick example -
extract of the original vector :
lema, rb 2% rb 2% rb 3% rb 4% rb 3%
Dear David,
does the following work for you?
sVec - c(lema, rb 2%, rb 2%, rb 3%, rb 4%, rb 3%, rb 2%,mineuse,
rb, rb,
rb 12, rb, rj 30%, rb, rb, rb 25%, rb, rb, rb, rj, rb)
reVec - regexpr([[:digit:]]+, sVec)
# see ?regex for details on '[:digit:]' and '+'
substr(sVec ,start = reVec,
On Mon, 2007-07-30 at 13:58 +0200, GOUACHE David wrote:
Hello all,
I have a vector of character strings, in which I have letters,
numbers, and symbols. What I wish to do is obtain a vector of the same
length with just the numbers.
A quick example -
extract of the original vector :
lema,
I assume if you want the components to be NA then you really intend
the result to be a numeric vector. The following replaces all non-digits
with (thereby removing them) and then uses as.numeric to convert the
result to numeric. Just omit the conversion if you want a character
vector result:
gsub( , , gsub(%, , gsub([a-z], , c(tr3,jh40%qs dqd
[1] 3 40
Jacques VESLOT
INRA - Biostatistique Processus Spatiaux
Site Agroparc 84914 Avignon Cedex 9, France
Tel: +33 (0) 4 32 72 21 58
Fax: +33 (0) 4 32 72 21 84
GOUACHE David a écrit :
Hello all,
I have a vector of character
] regular expressions : extracting numbers
Hello all,
I have a vector of character strings, in which I have letters, numbers, and
symbols. What I wish to do is obtain a vector of the same length with just the
numbers.
A quick example -
extract of the original vector :
lema, rb 2% rb 2% rb 3% rb 4% rb
