addSignature: Add new signature(s) to an existing set of mutation...
In sjdlabgroup/MutSigTools: Mutational signature analysis

Add new signature(s) to an existing set of mutation signatures, and return the updated signature set.

1	addSignature(sigmatrix2, sigmatrix1)

`sigmatrix2`	An object of class mutsig describing the new signature.
`sigmatrix1`	An object of class mutsig describing the existing set of signatures.

Addition of one or more new mutation signature(s) to an existing set of mutation signatures upon which the updated signature set is returned.

An object of mutsig class.

1 2	newSigMatrix=addSignature(sigmatrix2=signatures.cosmic[c('Signature.10','Signature.11'),], sigmatrix1=signatures.cosmic[c('Signature.1','Signature.2'),])