igraph_matrix_e
0 1 2 
3 4 5 
6 7 8 
9 10 11 
igraph_matrix_e_ptr
0 1 2 
3 4 5 
6 7 8 
9 10 11 
igraph_matrix_set
 0 0 0
 1 1 1
 2 2 2
 3 3 3
 0 1 2
 0 1 2
 0 1 2
 0 1 2
igraph_matrix_fill
 42 42 42
 42 42 42
 42 42 42
 42 42 42
 -42.1 -42.1 -42.1
 -42.1 -42.1 -42.1
 -42.1 -42.1 -42.1
 -42.1 -42.1 -42.1
igraph_matrix_update
 0 1 2
 3 4 5
 6 7 8
 9 10 11
igraph_matrix_rbind
 0 1 2
 3 4 5
 6 7 8
 9 10 11
 0 1 2
 3 4 5
 6 7 8
 9 10 11

 0 1 2
 3 4 5
 6 7 8
 9 10 11
 0 1 2
 3 4 5
 6 7 8
 9 10 11

 0 1 2
 3 4 5
 6 7 8
 9 10 11
 0 1 2
 3 4 5
 6 7 8
 9 10 11
igraph_matrix_cbind
 0 1 2 0 1
 3 4 5 2 3
 6 7 8 4 5
 9 10 11 6 7
igraph_matrix_swap
 0 1
 2 3
 4 5
 6 7
 0 0
 0 0
 0 0
 0 0
igraph_matrix_get_row
igraph_matrix_set_row
 0 1
 2 3
 4 5
 6 7
igraph_matrix_set_col
 0 1
 2 3
 4 5
 6 7
igraph_matrix_swap_rows
 4 5
 2 3
 0 1
 6 7
igraph_matrix_swap_cols
 5 4
 3 2
 1 0
 7 6
igraph_matrix_add_constant
 5 4
 3 2
 1 0
 7 6
 4 3
 2 1
 0 -1
 6 5
igraph_matrix_add
 0 2
 4 6
 8 10
 12 14
igraph_matrix_sub
 0 1
 2 3
 4 5
 6 7
igraph_matrix_mul_elements
 0 1
 4 9
 16 25
 36 49
igraph_matrix_div_elements
 0 0.5
 2 4.5
 8 12.5
 18 24.5
igraph_matrix_min
igraph_matrix_which_min
igraph_matrix_which_max
igraph_matrix_minmax
-2 100
igraph_matrix_which_minmax
igraph_matrix_isnull
igraph_matrix_empty
igraph_matrix_is_symmetric
igraph_matrix_prod
 1 2
 3 4
 5 6
product: 720
igraph_matrix_rowsum
 3 7 11
igraph_matrix_colsum
 9 12
igraph_matrix_contains
igraph_matrix_search
igraph_matrix_remove_row
 1 2
 5 6
 0 1 2 3
 4 5 6 7
 8 9 10 11
 12 13 14 15
 4 5 6 7
 8 9 10 11
 12 13 14 15
igraph_matrix_select_cols
 0 4 2
 0 4 2
 0 4 2
 0 4 2
 0 4 2
 0 4 2
 0
 0
 0
 0
 0
 0