Python同情 | Matrix.nullspace() 方法
借助sympy.Matrix().nullspace()方法,我们可以找到矩阵的 Nullspace。 Matrix().nullspace()返回跨越矩阵零空间的列向量列表。
Syntax: Matrix().nullspace()
Returns: Returns a list of column vectors that span the nullspace of the matrix.
示例 #1:
# import sympy
from sympy import *
M = Matrix([[1, 0, 1, 3], [2, 3, 4, 7], [-1, -3, -3, -4]])
print("Matrix : {} ".format(M))
# Use sympy.nullspace() method
M_nullspace = M.nullspace()
print("Nullspace of a matrix : {}".format(M_nullspace))
输出:
Matrix : Matrix([[1, 0, 1, 3], [2, 3, 4, 7], [-1, -3, -3, -4]])
Nullspace of a matrix : [Matrix([
[ -1],
[-2/3],
[ 1],
[ 0]]), Matrix([
[ -3],
[-1/3],
[ 0],
[ 1]])]
示例 #2:
# import sympy
from sympy import *
M = Matrix([[14, 0, 11, 3], [22, 23, 4, 7], [-12, -34, -3, -4]])
print("Matrix : {} ".format(M))
# Use sympy.nullspace() method
M_nullspace = M.nullspace()
print("Nullspace of a matrix : {}".format(M_nullspace))
输出:
Matrix : Matrix([[14, 0, 11, 3], [22, 23, 4, 7], [-12, -34, -3, -4]])
Nullspace of a matrix : [Matrix([
[-1405/4254],
[ -10/709],
[ 314/2127],
[ 1]])]