This constructor function wraps a 9x9 integer matrix and associates it
with a set of levels, creating a 'forms_matrix' object.
Arguments
- x
Integer. A 9x9 matrix.
- levels
Named integer vector. Map of integer values to their string
names. This is typically the output of get_forms_grass_enum()
.
Value
An object of class c("forms_matrix", "matrix", "array")
.