mod_lossfunctions¶

Convenience module for loading all loss functions.

This module provides a centralized factory interface for creating and accessing different types of loss functions used in RuNNer. It serves as a registry and factory for all available loss function implementations.

Available loss functions: - Mean Absolute Error (MAE) - L1 loss, robust to outliers - Mean Squared Error (MSE) - L2 loss, commonly used for regression - Root Mean Squared Error (RMSE) - Square root of MSE

Usage example:

type(LossFunctionPtr) :: my_loss
my_loss = get_loss_function(MAE_IDX, collect=.true.)

author: Alea Tokita, Alexander Knoll

Dependencies¶

Procedures Summary¶

Procedure Details¶

function get_loss_function¶

function get_loss_function( &
    loss_function_index, &
    collect &
)

Factory function to create loss function objects by index.

Creates and returns a polymorphic pointer to the requested loss function type. The function acts as a factory, instantiating the appropriate concrete loss function based on the provided index.

loss_function_index - Numeric identifier for the loss function type collect - Whether to collect/average values across MPI processes Returns: Polymorphic pointer to the created loss function

Arguments

• loss_function_index : integer [in]– Loss function type identifier
• collect : logical [in]– Whether to average across MPI processes

Called By

function get_loss_function_idx¶

function get_loss_function_idx( &
    name &
)

Convert loss function name string to numeric index.

This function maps loss function names (as strings) to their corresponding numeric identifiers. It's typically used when parsing input files that specify loss functions by name.

Supported names (case-insensitive): - 'mae' : MAE_IDX (Mean Absolute Error) - 'mse' : MSE_IDX (Mean Squared Error) - 'mse_torch': MSE_TORCH_IDX (MSE without factor of 0.5). - 'rmse' : RMSE_IDX (Root Mean Squared Error)

name : String name of the loss function Returns: Numeric index corresponding to the loss function

Arguments

• name : character [in]– Loss function name string

Called By