[R] Latin Hypercube with condition sum = 1

[Rainer M Krug]

Hi

I want to du a sensitivity analysis using Latin Hypercubes. But my
parameters have to fulfill two conditions:

1) ranging from 0 to 1
2) have to sum up to 1

So far I am using the lhs package and am doing the following:

library(lhs)
ws <- improvedLHS(1000, 7)
wsSums <- rowSums(ws)
wss <- ws / wsSums

but I think I can't do that, as after the normalization

> min(wss)
[1] 0.0001113015
> max(wss)
[1] 0.5095729

Therefore my question: how can I create a Latin Hypercube whicgh
fulfills the conditions 1) and 2)?

Thanks a lot

Rainer


-- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Faculty of Science
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University of Stellenbosch
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South Africa