GeneNMF v0.6.0

New in this version:

• We updated how meta-programs (MPs) are calculated from individual programs. Instead of extracting gene sets for each program and then calculating a consensus, we keep the full vector of gene weights and calculate cosine similarities between the vectors. Consensus gene weights are then calculated as the average over all programs in a MP.
• To impose sparsity in the decomposition, we include a specificity.weight parameter, which is used to re-normalize NMF loadings based on how specific a gene is for a given program.
• To determine the number of genes to be included in a MP, we calculate the cumulative distribution for the gene weights in a given MP. Only genes that cumulatively explain up to a fraction of the total weight (weight.explained parameter) are included in the MP gene set.
• The definition and default of min.confidence has changed. The confidence of a gene in a given MP is calculated as the fraction of programs in which the gene has been determined to be part of the invidual program (using weight.explained=0.8).
• The parameter nprograms in the function getMetaPrograms() has been renamed to nMP, to avoid confusion
• New defaults: expression matrices are now by default not scaled or centered (the behavior can be altered using the scale and center parameters)