[Reposting to list]
Thank you Rich.
I still don't get it.
If i understand correctly- the MMC example on maize data outlines an
issue with the multiple ties between group means. As a result of this,
"user specified contrasts" needed specifying.
Its this part, understanding the design matrix (ie., the 'treatment
contrast' for the ANOVA &/or lm design) so that one knows *how* to set
up cunstom contrasts- the underlying logic- that i need to learn. Demystify.
In this maize example, if it is explained, regretfully i missed it.
Perhaps i'm making somthing out of nothing, its self evident and i'm
just complicating it. In that case a bucket of cold water is what i
need. But maybe you have another example? Or an explicit tutorial
covering this?
Unfortunatley the local stats here are thin on the ground and thus
overworked. No time for "R-101" for troublsome biologists like me...
Back to the miaze example in case i missed 'it', and with sincere thanks
for your suggestion,
karl
On 6/1/2010 6:03 PM, RICHARD M. HEIBERGER wrote:
>
> Please look at the maiz example, the last example in ?MMC in the HH
package.
> Follow the example all the way to the end. It illustrates a problem and
> then the resolution
> of the problem.
> install.packages("HH") ## if you don't have it yet.
> library(HH)
> ?MMC
> Rich
--
Karl Brand <k.br...@erasmusmc.nl>
Department of Genetics
Erasmus MC
Dr Molewaterplein 50
3015 GE Rotterdam
P +31 (0)10 704 3409 | F +31 (0)10 704 4743 | M +31 (0)642 777 268
On 6/1/2010 6:03 PM, RICHARD M. HEIBERGER wrote:
Please look at the maiz example, the last example in ?MMC in the HH package.
Follow the example all the way to the end. It illustrates a problem and
then the resolution
of the problem.
install.packages("HH") ## if you don't have it yet.
library(HH)
?MMC
Rich
--
Karl Brand <k.br...@erasmusmc.nl>
Department of Genetics
Erasmus MC
Dr Molewaterplein 50
3015 GE Rotterdam
P +31 (0)10 704 3409 | F +31 (0)10 704 4743 | M +31 (0)642 777 268
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