[R] MANOVA
Jorge Magalhaes
root at predict.telepac.pt
Tue Jul 11 19:14:32 CEST 2000
Hi
I need to compare the performance of two sludge inertization methods. For that i want make a manova Wilks test.
Description of the experiment:
After the calcination at different temperatures my calcinated sludge are submeted to the lixiviation test. In my tables i show the concentration of the some elements in the extract phase.
The results:
Method A (calcination at 1100 C)
Chromium Nickel Aluminum Zinc
2.0 3.0 2.7 2.3
2.1 3.1 2.8 2.2
1.9 3.2 2.6 2.3
2.2 3.1 2.8 2.2
Method B (calcination at 1500 C)
Chromium Nickel Aluminum Zinc
2.1 3.1 2.6 2.2
2.3 2.9 3.0 2.5
1.9 3.0 2.6 2.2
2.2 3.0 2.9 2.1
2.4 3.1 2.7 2.2
2.3 3.0 2.6 2.1
1.8 2.8 2.7 2.0
Assumptions:
lambda = |W|/(|W + B|)
W is the pooled cross product matrix
|W| is the determinant of W
B is a matrix of pooled and weighted between-sample mean deviations
T the cross product matrix = W + B
Main Problem:
How i can compute lambda in R environment?
Thanks in advance
Have a nice day
Jorge
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