dot_product#

Calculates the dot product of two vectors and returns the result (scalar). The dot product is the sum over the product of the elements.

float uz_matrix_dot_product(uz_matrix_t const *const A, uz_matrix_t const *const B)#

Calculates the dot product (scalar product) of the column vectors A and B. Rows of A and B have to be 1 and the column dimension mus be equal.

Parameters:

  • A – Column or row vector

  • B – Column or row vector

Returns:

float

Vector Example#

\[\begin{split}\begin{bmatrix} 1 & 2 & 3 \end{bmatrix} \cdot \begin{bmatrix} 1 & 2 & 3 \end{bmatrix} &= (1 \cdot 1) + (2 \cdot 2) + (3 \cdot 3) \\ &= 14\end{split}\]
 1
 2void test_uz_matrix_dot_product_two_column_vectors(void){
 3    uint32_t rows=1;
 4    uint32_t columns=4;
 5    float A_data[4]={1,2,3,4};
 6    float B_data[4]={1,2,3,4};
 7    uz_matrix_t* A=init_array_test_helper(A_data,UZ_MATRIX_SIZE(A_data),rows, columns );
 8    uz_matrix_t* B=init_array_test_helper(B_data,UZ_MATRIX_SIZE(B_data),rows, columns );
 9    float C=uz_matrix_dot_product(A,B);
10    TEST_ASSERT_EQUAL_FLOAT(30,C);