你可以帮我写一段关于如何定义一个矩阵类的命令码
时间: 2023-06-03 13:04:03 浏览: 39
Sure, I can help you with that. Here is an example command code for defining a matrix class:
```
class Matrix:
def __init__(self, rows, cols):
self.num_rows = rows
self.num_cols = cols
self.data = [[0 for j in range(cols)] for i in range(rows)]
def get_element(self, i, j):
return self.data[i][j]
def set_element(self, i, j, val):
self.data[i][j] = val
def get_dimensions(self):
return (self.num_rows, self.num_cols)
def add(self, other_matrix):
if self.get_dimensions() != other_matrix.get_dimensions():
raise Exception("Matrices must have the same dimensions to add them together")
new_mat = Matrix(self.num_rows, self.num_cols)
for i in range(self.num_rows):
for j in range(self.num_cols):
new_mat.set_element(i, j, self.get_element(i, j) + other_matrix.get_element(i, j))
return new_mat
def multiply(self, other_matrix):
if self.num_cols != other_matrix.num_rows:
raise Exception("The number of columns of the first matrix must match the number of rows of the second matrix to multiply them together")
new_mat = Matrix(self.num_rows, other_matrix.num_cols)
for i in range(self.num_rows):
for j in range(other_matrix.num_cols):
dot_product = 0
for k in range(self.num_cols):
dot_product += self.get_element(i, k) * other_matrix.get_element(k, j)
new_mat.set_element(i, j, dot_product)
return new_mat
```
Hope this helps!