Maybe this post on block designs is what the doctor ordered?

http://www.wekaleamstudios.co.uk/posts/generating-balanced-incomplete-block-designs-bibd/

Cheers,
Roman



On Sat, Jul 17, 2010 at 9:46 PM, shylock holmes <tulugaq17@hotmail.com>wrote:

>
> Hi all, I am totally new to R - never used it and just beginning to read
> through the websites and posted notes to learn what and how R does things.
> So for what I am planning on doing, I have no clue really, and wanted to ask
> for some advice.
>
> I have 3 insect species that I am planning on letting oviposit one egg onto
> different diets (or hosts): there are 4 types of food with 4 variants of
> each food type (i.e., original food type a, artificially created food type
> a, artificial food type a with substitute x, artificial food type a with
> substitute y, and so on for all other food types); I am also planning that
> each food type with all variants is replicated 20 times per insect species
> (in total 960 eggs with 320 eggs per insect species with 20 eggs on 16
> different food variants as above). How can I randomize the order of food
> items and what insect species lays eggs on what food type the best way by
> using R?
>
> Any suggestions are greatly appreciated!!!
>
> Many thanks
>
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-- 
In God we trust, all others bring data.

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