MArrayLM2 object returned by
cov.coefficients.list as its components.
cov.coefficients is a single matrix, and
cov.coefficients.list is a list of matrices that are as many as the genes included in the analysis. The
?dream documentation has no explanation for these components, and the
?MArrayLM documentation of
limma states that
cov.coefficients is a "numeric matrix giving the unscaled covariance matrix of the estimable coefficients." That still doesn't make a clear sense to me because the covariance matrix of coefficients should be different for each gene, but
cov.coefficients is just a single matrix. I also checked if
cov.coefficients is the same as
coefficients is another component that
dream() return), but it was not the case. Can someone clarify what they really are?