Double precision column and row vector types and functions. More...

#include <dmlfw_types.h>

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typedef struct __dmlfw_column_vec_double	dmlfw_column_vec_double
	Opaque structure representing a column vector of doubles.

void	dmlfw_column_vec_double_copy (dmlfw_column_vec_double target_vector, dmlfw_column_vec_double source_vector)
	Copies the contents of one column vector to another.

dmlfw_column_vec_double *	dmlfw_column_vec_double_create_new (dimension_t rows)
	Creates a new column vector of specified size.

dmlfw_column_vec_double *	dmlfw_column_vec_double_create_new_filled (dimension_t rows, double value, dmlfw_column_vec_double *vector)
	Creates or fills a column vector with a specified value.

void	dmlfw_column_vec_double_destroy (dmlfw_column_vec_double *vector)
	Destroys a column vector and frees its memory.

dmlfw_column_vec_double *	dmlfw_column_vec_double_from_csv (const char csv_file_name, dmlfw_column_vec_double vector, dmlfw_row_vec_string **header)
	Loads a column vector from a one-column CSV file.

double	dmlfw_column_vec_double_get (dmlfw_column_vec_double *vector, index_t index)
	Retrieves the value of an element in a column vector.

double	dmlfw_column_vec_double_get_mean (dmlfw_column_vec_double *vector)
	Computes the mean of all elements in a column vector.

dimension_t	dmlfw_column_vec_double_get_size (dmlfw_column_vec_double *vector)
	Returns the number of elements in a column vector.

void	dmlfw_column_vec_double_set (dmlfw_column_vec_double *vector, index_t index, double value)
	Sets the value of an element in a column vector.

void	dmlfw_column_vec_double_to_csv (dmlfw_column_vec_double vector, const char csv_file_name, dmlfw_row_vec_string *header)
	Exports a column vector to a CSV file with a header.

dmlfw_row_vec_double *	dmlfw_column_vec_double_transpose (dmlfw_column_vec_double vector, dmlfw_row_vec_double transposed_vector)
	Transposes a column vector into a row vector.

typedef struct __dmlfw_row_vec_double	dmlfw_row_vec_double
	Opaque structure representing a row vector of doubles.

void	dmlfw_row_vec_double_copy (dmlfw_row_vec_double target_vector, dmlfw_row_vec_double source_vector)
	Copies the contents of one row vector to another.

dmlfw_row_vec_double *	dmlfw_row_vec_double_create_new (dimension_t columns)
	Creates a new row vector of specified size.

dmlfw_row_vec_double *	dmlfw_row_vec_double_create_new_filled (dimension_t columns, double value, dmlfw_row_vec_double *vector)
	Creates or fills a row vector with a specified value.

void	dmlfw_row_vec_double_destroy (dmlfw_row_vec_double *vector)
	Destroys a row vector and frees its memory.

dmlfw_row_vec_double *	dmlfw_row_vec_double_from_csv (const char csv_file_name, dmlfw_row_vec_double vector, dmlfw_row_vec_string **header)
	Loads a row vector from a CSV file.

double	dmlfw_row_vec_double_get (dmlfw_row_vec_double *vector, index_t index)
	Retrieves the value of an element in a row vector.

double	dmlfw_row_vec_double_get_mean (dmlfw_row_vec_double *vector)
	Computes the mean of all elements in a row vector.

dimension_t	dmlfw_row_vec_double_get_size (dmlfw_row_vec_double *vector)
	Returns the number of elements in a row vector.

void	dmlfw_row_vec_double_set (dmlfw_row_vec_double *vector, index_t index, double value)
	Sets the value of an element in a row vector.

void	dmlfw_row_vec_double_to_csv (dmlfw_row_vec_double vector, const char csv_file_name, dmlfw_row_vec_string *header)
	Exports a row vector to a CSV file with a header.

dmlfw_column_vec_double *	dmlfw_row_vec_double_transpose (dmlfw_row_vec_double vector, dmlfw_column_vec_double transposed_vector)
	Transposes a row vector into a column vector.

Detailed Description

Double precision column and row vector types and functions.

Version: 1.0

Date: 2025-09-25

This header defines opaque vector data structures for double precision floating-point values. It provides APIs for creating, destroying, accessing, modifying, and manipulating both column and row vectors.

Common operations include:

Creation and destruction
Element access and mutation
Transposing between row and column vectors
CSV import/export
Basic statistics (mean, size, etc.)
Copying contents

Error Handling:

All functions report errors through the centralized error API:

Call dmlfw_error() to check whether an error occurred.
Use dmlfw_get_error_string() and dmlfw_get_debug_string() for error details and debugging info.

Unless otherwise stated:

Passing NULL pointers or invalid arguments sets error status.
On error, functions return NULL, 0, or 0.0 depending on return type.