Message-ID: <5934ae57050412233850ca8f7f@mail.gmail.com>
Date: 2005-04-13T06:38:18Z
From: Rich FitzJohn
Subject: how to separate a string
In-Reply-To: <20050413062352.52175.qmail@web30701.mail.mud.yahoo.com>
To get the first character from a string, use substr(s, 1, 1)
To split strings at a period, use strsplit(s, "\\.") (the period must
be quoted, as "." matches anything in a regular expression).
To get the index for "." in a string, see "?regexpr, but you will not
need to do that if you use strsplit().
Cheers,
Rich
On 4/13/05, Cuichang Zhao <cuiczhao at yahoo.com> wrote:
> hello,
> i wonder how is string represent in R. if i have a string s= "hello", how
> can i refer to first character in the string s?
> also if i have s1 = "hello.1", s2 = "ok.1", how can i separate the s1 into
> "hello" "1" and s2 into "ok" and "1"? I have tried to use the substring
> function, but i don't where i can get the index for "." in the string?
>
> Thank you so much
>
> C-Ming
> April 12, 2005
>
>
> ---------------------------------
>
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--
Rich FitzJohn
rich.fitzjohn <at> gmail.com | http://homepages.paradise.net.nz/richa183
You are in a maze of twisty little functions, all alike