Communications Toolbox

gftrunc

Minimize the length of a polynomial representation

Syntax

• c = gftrunc(a);
  

Description

c = gftrunc(a) truncates a row vector, a, that gives the coefficients of a GF(p) polynomial in order of ascending powers. If a(k) = 0 whenever k > d + 1, then the polynomial has degree d. The row vector c omits these high-order zeros and thus has length d + 1.

Examples

In the code below, zeros are removed from the end, but not from the beginning or middle, of the row-vector representation of x² + 2x³ + 3x⁴ + 4x⁷ + 5x⁸.

• c = gftrunc([0 0 1 2 3 0 0 4 5 0 0])
  
  c =
  
       0     0     1     2     3     0     0     4     5
  

See Also
gfadd, gfsub, gfconv, gfdeconv, gftuple

gftable

gftuple