Question

matlab求助

VanMatrix = gf(zeros(w)+1,q); 这句不明白
求助gf（）函数作用及使用方法，小菜鸟一个……
分数不多 谢谢大家。
希望有中文回答，最好讲一下加和华域的作用

Answer 1

x_gf = gf(x,m) creates a Galois field array from the matrix x. The Galois field has 2^m elements, where m is an integer between 1 and 16. The elements of x must be integers between 0 and 2^m-1. The output x_gf is a variable that MATLAB recognizes as a Galois field array, rather than an array of integers. As a result, when you manipulate x_gf using operators or functions such as + or det, MATLAB works within the Galois field you have specified.

Note To learn how to manipulate x_gf using familiar MATLAB operators and functions, see Galois Field Computations. To learn how the integers in x represent elements of GF(2^m), see How Integers Correspond to Galois Field Elements.

x_gf = gf(x,m,prim_poly) is the same as the previous syntax, except it uses the primitive polynomial prim_poly to define the field. prim_poly is the integer representation of a primitive polynomial. For example, the number 41 represents the polynomial D^5+D^2+1 because the binary form of 37 is 1 0 0 1 0 1. For more information about the primitive polynomial, see Specifying the Primitive Polynomial.

x_gf = gf(x) creates a GF(2) array from the matrix x. Each element of x must be 0 or 1.

Answer 2