[BioC] Limma error

[Saurin Jani]

Hi,

I have 12 CEL files and 4 Different groups. 2
untreated and 2 treated. Can anyone tell me what could
be wrong with my design matrix. My CEL files are
highly variable or something? Any answer would be
helpful. 

I have below error :

> results <- decideTests(fit);
Error in array(x, c(length(x), 1), if
(!is.null(names(x))) list(names(x),  :
        attempt to set an attribute on NULL

What I did is:

> treatments <-
factor(c(1,1,1,2,2,2,3,3,3,4,4,4),labels =
c("Group1","Group2","Group3","Group4"));
> contrasts(treatments) <- cbind(comp1 =
c(1,0,1,0),comp2 = c(1,1,0,0), comp3 = c(0,1,1,0));
> design <- model.matrix(~treatments);
> colnames(design) <-
c("Intersept","G1_G3","G1_G2","G2_G3");
> design
   Intersept G1_G3 G1_G2 G2_G3
1          1     1     1     0
2          1     1     1     0
3          1     1     1     0
4          1     0     1     1
5          1     0     1     1
6          1     0     1     1
7          1     1     0     1
8          1     1     0     1
9          1     1     0     1
10         1     0     0     0
11         1     0     0     0
12         1     0     0     0
attr(,"assign")
[1] 0 1 1 1
attr(,"contrasts")
attr(,"contrasts")$treatments
       comp1 comp2 comp3
Group1     1     1     0
Group2     0     1     1
Group3     1     0     1
Group4     0     0     0

> fit <- lmFit(myRMA,design);
> results <- decideTests(fit);
Error in array(x, c(length(x), 1), if
(!is.null(names(x))) list(names(x),  :
        attempt to set an attribute on NULL
> vennDiagram(results);
Error in .class1(object) : Object "results" not found

Thank you,
Saurin