[BioC] Finding genes with significant linear regression, or trend
Assaf Oron
aoron at fhcrc.org
Tue May 20 23:03:51 CEST 2008
Daniel hi,
You can also try the function "lmPerGene" from the new package GSEAlm.
This function allows for continuous covariates without recoding them as
factors. The function returns an object, say "mylm".
To get the t-statistics, divide "mylm$coefficients" by
"sqrt(mylm$coef.var)". Note that the coefficients and their variances
are matrices with the first row being the intercept. You can then take
these t-statistics to your favorite significance/FDR sofware. You can
also use it for gene-set-enrichment analysis (see the GSEAlm vignette
for more details).
If you try to use the function and have more questions, you can write me
directly.
Assaf
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