Coerce a mutSignExposures-class object to data.frame by applying the coerceObj method. The data.frame can be returned in a transposed or non-transposed format.
# S4 method for mutSignExposures
as.data.frame(x, row.names = NULL, optional = NULL, ...)
a mutSignExposures object
NULL, not used
NULL, not used
additional parameters to be passed to coerceObj, such as transpose (logical)