[R] Calculating lengths of runs of 0 or 1 sequences in meteorological data

From: Mohammad Ehsanul Karim <wildscop_at_yahoo.com>
Date: Fri 11 Mar 2005 - 22:07:56 EST


Dear List Members,

I need some help about programming in S language. My problem is as follows:

I have meteorological data (about rainfall measurement each day from 1989-2002), say like
http://www.angelfire.com/ab5/get5/data.rainfall.txt or http://www.angelfire.com/ab5/get5/R.rainfall.txt in a sequence of 0(denoting dry day)'s and 1(denoting wet day)'s. I want to construct a frequency distribution table of various lengths
(1,2,3,4,5,6,7,8,9,or more) of observed wet spells
(number of successive 1's) and dry spells (number of
successive 0's) occurring in data.

How should i proceed? Is there any existing program/function/package to solve such problem (seems like the algorithm should be similar to statistical run test)?

Any suggestion, direction, references, help, replies will be highly appreciated.

Thank you for your time.


Mohammad Ehsanul Karim
E-mail: wildscop@yahoo.com
Web: http://snipurl.com/ehsan
ISRT, University of Dhaka, BD



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