[R] Cut a within elements by length, not value, of vectors

[Martyn Byng]

Hi,

Is this what you are looking for?

a = c(528,528,528,528,708,708,529,1208,423,1506,321)

paste(substr(a,1,nchar(a)-2),substr(a,nchar(a)-1,nchar(a)),sep="/")
 [1] "5/28"  "5/28"  "5/28"  "5/28"  "7/08"  "7/08"  "5/29"  "12/08"
"4/23"  "15/06" "3/21"

Martyn

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of btc1
Sent: 15 July 2010 18:22
To: r-help at r-project.org
Subject: [R] Cut a within elements by length, not value, of vectors


Hello, I have a vector, "dates", as a series of 3 digit elements, i.e. >
date
  [1] 528 528 528 528 528 528 528 528 528 528 528 528 708 708 708 708
708
708
 [19] 708 708 708 708 529 529 529 529 529 529 529 529 529 529 529 529
529
529
 [37] 529 624

I need to convert them into julian, but have to insert a "/" or "-"
after
the first number within each element of the vector (5/28 5/28 etc).
Found
plenty functions to replace by a pattern but not to cut by a certain
number
of digits with an element. Alternately, if I could run all the elements
into
one long vector and then cut every one then two digits, that would work
as
well.

Thanks.
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