Build a sparse skill-profession matrix

Converts a long-format data.table with skill-profession associations into a sparse dgCMatrix. Rows represent skills and columns represent professions.

Usage

build_skill_prof_sparse(balassa, value_col = "N", prof_col = "cod_3")

Arguments

balassa

data.table with skill-profession associations. Must contain columns escoskill_level_3, prof_col, and the column named by value_col.

value_col

Character, column name for cell values. Use "N" for counts or "balassa_index" for RCA values. Default: "N".

prof_col

Character, column name for profession identifiers. Default: "cod_3".

Value

A dgCMatrix with skills as rows and professions as columns.