This is a trichotomous guide matrix (53 by 11) corresponding to the 10 immune cell types and melanoma each row represents a gene. For the i-j entry, it is encoded as 1 when this gene i is NOT a signature gene to celltype j; and it is encoded as 0.5 it is a secodnary siganture gene for the j cell type; and 0 if it is a primary signature gene for j-th cell type. This encoding is counter-intuitive (if you think it should be the other way around) is because it is easier to take this form for penalization.
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