stray_transforms.RdThese are a collection of convenience functions for transforming stray fit objects to a number of different representations including ILR bases, CLR coordinates, ALR coordinates, and proportions.
to_proportions(m) to_alr(m, d) to_ilr(m, V = NULL) to_clr(m) # S3 method for pibblefit to_proportions(m) # S3 method for orthusfit to_proportions(m) # S3 method for pibblefit to_alr(m, d) # S3 method for orthusfit to_alr(m, d) # S3 method for pibblefit to_ilr(m, V = NULL) # S3 method for orthusfit to_ilr(m, V = NULL) # S3 method for pibblefit to_clr(m) # S3 method for orthusfit to_clr(m)
| m | object of class pibblefit or orthusfit (e.g., output of |
|---|---|
| d | (integer) multinomial category to take as new alr reference |
| V | (matrix) contrast matrix for ILR basis to transform into to (defaults to
|
object
For orthus, transforms only appleid to log-ratio parameters
Note: that there is a degeneracy of representations for a covariance
matrix represented in terms of proportions. As such the function
to_proportions does not attempt to transform parameters Sigma
or prior Xi and instead just removes them from the pibblefit object returned.
if (FALSE) { m <- pibble(Y, X) m.prop <- to_proportions(m) # convert back to default coordinates (alr with D-th part as reference) m <- to_alr(m.prop, ncategories(m)) V <- driver::create_default_ilr_base(ncategories(m)) m.ilr <- to_ilr(m, V) m.clr <- to_clr(m) }