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API overview

Scale

Creation

• load_scale
• predefined_scale (rename to load_predefined_scale?)
• scale_from_csv
• scale_from_df
• subscale (from select_categories)

Manipulation

• remove_items

Display scale information

• all_items
• item_level_count
• item_parameter_names
• items_by_type
• items_in_categories
• scale_overview

Save scale

• save_scale

Model

Creation

• irt_model

Add model features

• add_dataset
• add_simulation
• add_lv_model
• add_estimation_option

Set model attributes

• set_scale
• set_initial_estimates (from initial_estimates_from_data and initial_estimates_item_parameters)
• set_run_number
• fix_item_parameters
• ignore_items

Display model information

• list_initial_estimates (from initial_estimates_overview)

Code generation

• print_model (rename to print_model_code)
• save_model (rename to write_model_code)

Estimation

• estimate_item_parameters
• estimate_lv_values

Diagnostic plots

• correlation_plot
• icc_plots
• mirror_plots

Utility

• check_data (rename from data_check)
• prepare_lv_model