glmnet_coefs: Extract glmnet model coefficients.
In dhimmel/hetior: Machine learning tools for hetnet edge prediction

Extract standardized and unstandardized coefficients.

1	glmnet_coefs(cv_glmnet, X, y, s = "lambda.1se", prepend = "", ...)

`cv_glmnet`	a `cv.glmnet` object to extract coefficients for.
`X`	matrix of features used to train `cv_glmnet`
`y`	outcome used to train `cv_glmnet`
`s`	Value(s) of the penalty parameter lambda at which predictions are required
`prepend`	text to prepend to the `coef` and `zcoef` column names