[FLR-list] datras R library

Doug Beare doug.beare at gmail.com
Wed Oct 5 08:52:00 CEST 2011


Hi Guys,

I've been writing an R library to analyse trawl survey data. It all 
starts with ICES exchange format. It's still in its infancy and my 
programming is crappy. Probably be worth using 'methods' etc. It 
probably needs a complete re-write.
The aim is to produce time-series, diversity indices,  maps, nos at age 
indices etc. in a standardised manner which would be applicable to all the
data stored by ICES (BTS, IBTS, ALTBITS etc.). Code would only be 
acceptable if it did something useful with data in this format. The 
library also includes bathymetry data, ITIS species names, length-weight 
parameters which makes it particularly handy.

We could build in all the varied manners in which age-length keys and 
nos-at-age indices are calculated across all the Institutes of Europe 
etc. Maybe develop methods to combine data from different surveys etc. 
etc. Explore spatial models, multinomial models for ALKs etc. etc. 
Standardise methods for 'Good Environmental Status' indicators etc. blah 
blah. Investigate impacts of 'survey design'.
I've adapted some code from the recent vmstools project too.

I know that there are 100s of other bits of code out there and probably 
other libraries?  Let me know if you want to get involved.
I've set up a google repository:

http://code.google.com/p/datras/

If you look at the file Chrons01.r you will see examples of how it might 
work on chrons or station files.

Doug.



On 10/4/2011 10:26 PM, Laurie Kell wrote:
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