[R] Code to fetch summary info from vector

[Jessica Streicher]

Maybe rle can help a little here

rle(b>1)

Run Length Encoding
  lengths: int [1:5] 3 5 5 8 3
  values : logi [1:5] FALSE TRUE FALSE TRUE FALSE

 r<-rle(b>1)

r$lengths[r$values]
[1] 5 8

# started for the maximum but need to go home now, sorry. Will continue tomorrow if noone else finishes it.
groups <- rep(1:length(r$lengths),r$lengths)

On 15.01.2013, at 17:16, Benjamin Gillespie wrote:

> Hi all,
> 
> Thanks in advance for any help.
> 
> I have a vector "b":
> 
> b=c(1,1,1,2,3,4,3,2,1,1,1,1,1,2,3,4,5,4,3.5,3,2,1,1,1)
> 
> Imagine b is river flow throughout time.
> 
> I would like some code that will generate the following information:
> 
> number of individual 'periods' where b>1 (= 2 in this case)
> period 1 length = 5, max = 4
> period 2 length = 8, max = 5
> 
> I can't figure anything useful out.
> 
> Thanks,
> 		
> Ben Gillespie
> Research Postgraduate
> 
> School of Geography
> University of Leeds
> Leeds
> LS2 9JT
> 
> http://www.geog.leeds.ac.uk/
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