add custom parameters max_iter and tolerance (#5)

Author: kholdrex

lib/irt_ruby/rasch_model.rb

@@ -5,12 +5,12 @@
 module IrtRuby
   # A class representing the Rasch model for Item Response Theory.
   class RaschModel
-    def initialize(data)
+    def initialize(data, max_iter: 1000, tolerance: 1e-6)
       @data = data
       @abilities = Array.new(data.row_count) { rand }
       @difficulties = Array.new(data.column_count) { rand }
-      @max_iter = 1000
-      @tolerance = 1e-6
+      @max_iter = max_iter
+      @tolerance = tolerance
     end
 
     def sigmoid(x)

lib/irt_ruby/three_parameter_model.rb

@@ -5,14 +5,14 @@
 module IrtRuby
   # A class representing the Three-Parameter model for Item Response Theory.
   class ThreeParameterModel
-    def initialize(data)
+    def initialize(data, max_iter: 1000, tolerance: 1e-6)
       @data = data
       @abilities = Array.new(data.row_count) { rand }
       @difficulties = Array.new(data.column_count) { rand }
       @discriminations = Array.new(data.column_count) { rand }
       @guessings = Array.new(data.column_count) { rand * 0.3 }
-      @max_iter = 1000
-      @tolerance = 1e-6
+      @max_iter = max_iter
+      @tolerance = tolerance
     end
 
     def sigmoid(x)

lib/irt_ruby/two_parameter_model.rb

@@ -5,13 +5,13 @@
 module IrtRuby
   # A class representing the Two-Parameter model for Item Response Theory.
   class TwoParameterModel
-    def initialize(data)
+    def initialize(data, max_iter: 1000, tolerance: 1e-6)
       @data = data
       @abilities = Array.new(data.row_count) { rand }
       @difficulties = Array.new(data.column_count) { rand }
       @discriminations = Array.new(data.column_count) { rand }
-      @max_iter = 1000
-      @tolerance = 1e-6
+      @max_iter = max_iter
+      @tolerance = tolerance
     end
 
     def sigmoid(x)

spec/irt_ruby/rasch_model_spec.rb

@@ -4,7 +4,7 @@
 
 RSpec.describe IrtRuby::RaschModel do
   let(:data) { Matrix[[1, 0, 1], [0, 1, 0], [1, 1, 1]] }
-  let(:irt_model) { IrtRuby::RaschModel.new(data) }
+  let(:irt_model) { IrtRuby::RaschModel.new(data, max_iter: 2000) }
 
   describe "#sigmoid" do
     it "calculates the sigmoid of a value" do

spec/irt_ruby/three_parameter_model_spec.rb

@@ -4,7 +4,7 @@
 
 RSpec.describe IrtRuby::ThreeParameterModel do
   let(:data) { Matrix[[1, 0, 1], [0, 1, 0], [1, 1, 1]] }
-  let(:model) { IrtRuby::ThreeParameterModel.new(data) }
+  let(:model) { IrtRuby::ThreeParameterModel.new(data, max_iter: 1500) }
 
   describe "#initialize" do
     it "initializes with data" do

spec/irt_ruby/two_parameter_model_spec.rb

@@ -4,7 +4,7 @@
 
 RSpec.describe IrtRuby::TwoParameterModel do
   let(:data) { Matrix[[1, 0, 1], [0, 1, 0], [1, 1, 1]] }
-  let(:model) { IrtRuby::TwoParameterModel.new(data) }
+  let(:model) { IrtRuby::TwoParameterModel.new(data, max_iter: 3000) }
 
   describe "#initialize" do
     it "initializes with data" do