[BioC] filetr to Agilent 4 x 44 array

[Francois Pepin]

Hi Marco,

I have done something in the past at that particular cut-off.

I would suggest to take a look at your distribution of intensities to  
make sure that 6 is a reasonable threshold. I tend to have bimodal  
distributions with a sharp peak just below 6 and another later on, but  
your data might be different.

Another strategy is to use the Limma F statistics, if you want to also  
include genes which might be more highly expressed but also don't have  
any variations.

Hope this helps,

Francois

On Feb 18, 2010, at 1:45 AM, Marco Fabbri wrote:

> HI all,
>    I remeber that when I worked with affy chip , removing those genes
> that appear not to
> be expressed in either sample, value smaller than 6.
> I was wondering if I can apply a similar filter to Agilent 4 x 44 gene
> expression arrays.
>
> THank you
>
> MArco
>
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