Using filters programmatically in a custom directive

gistfile1.js

// current (works)

<div ng-repeat='movie in movies.titles | subcategories:categoryList()'>

// goal:

<div ng-repeat='filteredMovies()'>

link: function(scope, element, attrs) {
  scope.filteredMovies = function() {
    return appliedFilter(); // this is what I don't get
    // guessing something like subcategoriesFilter.apply(scope.categoryList());
  }
}