modSkew skews a data set by making all sample vectors
have the same total sum, introducing a new feature, and then
making all sample vectors again have the same total sum.
modSkew(object, alpha = 0, uniform = TRUE)An ExprsArray object. The object that should undergo a
replication of some feature selection and dimension reduction history.
An integer. The maximum range of skew factors used
for skewing if uniform = TRUE. The standard deviation
of the skew factors if uniform = FALSE. See Details.
A boolean. Toggles whether to draw skew factors from a uniform distribution or a normal distribution.
A pre-processed ExprsArray object.
If uniform = TRUE, skew factors are randomly sampled from
the uniform distribution (0, alpha) + 1. Otherwise, skew
factors are randomly sampled from the normal distribution with
a mean of 0 and standard deviation of alpha. When using
the normal distribution, these skew factors are transformed by
taking the absolute value then adding one. For this reason,
data are always unskewed when alpha = 0.