[R] a little question about R

John Fox jfox at mcmaster.ca
Wed Sep 8 02:38:27 CEST 2004

You can use letters[1:4].

I hope that this helps,

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of ??
> Sent: Tuesday, September 07, 2004 7:42 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] a little question about R
> Hello,sir: Here's a little question about R which needs your 
> help.Thanks in advance. 
> If I wanna make a sequence just like a,b,c,d (In other 
> words,a vector consists of 4 characters :a,b,c,d ).How can I 
> do it in a shortcut manner? Yes,I can do it as following: 
> c("a","b","c","d") and the result is:[1] "a" "b" "c" "d".
> But I remember there's a shortcut manner to do the same 
> thing,something like c("a":"d").But the system said:"Error in 
> "a":"d" : NA/NaN argument" So I wonder the correct method to 
> do it(I remember the expression is very similar with 
> c("a":"d")). Thanks from the bottom of my heart. My best regards!

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