To mathematically prepare a peg plan diagram and a threading draft diagram capable of preferably reducing the number of heddle frames in a method for weaving a fabric by using a long heddle.
The weaving method includes preparing Boolean matrix by setting floating of a warp as (1) and sinking thereof as (0) in an structure diagram input at S1 (S5); disassembling the Boolean matrix to the products of 2 Boolean matrices by using a graph theory (S7); and preparing the peg plan diagram and the threading draft diagram by using the disassembled Boolean matrices after disassembling (S9). The method also prepares the Boolean matrix similarly from the peg plan diagram of usual heddle (S15), disassembles the matrix to form the peg plan diagram (S17, S19), and the threading draft diagram may be prepared from the obtained peg plan diagram and the structure diagram input at S1.
ANDO MASAYOSHI