Python 计算逐列和逐行排序的矩阵中的负数个数

在这个示例中，我们将计算逐列和逐行排序的矩阵中的负数个数。首先，我们将创建一个矩阵−

mat = [
   [-1, 3, 5, 7],
   [-6, -3, 1, 4],
   [-5, -1, -10, 12]
]

将矩阵传递给自定义函数，并使用嵌套的for循环 –

def negativeFunc(mat, r, c):
   count = 0
      for i in range(r):
         for j in range(c):
            if mat[i][j] < 0:
           count += 1
        else:
       break
return count

上面，在for循环中检查每个矩阵元素是否为负数。 当找到负值时，计数会递增。

这是完整的示例−

示例

# The matrix must be sorted in ascending order, else it won't work
def negativeFunc(mat, r, c):
    count = 0
    for i in range(r):
        for j in range(c):
            if mat[i][j] < 0:
                count += 1
            else:
                break
    return count

# Driver code
mat = [
    [-1, 3, 5, 7],
    [-6, -3, 1, 4],
    [-5, -1, -10, 12]
]

print("Matrix = ",mat)
print("Count of Negative Numbers = ",negativeFunc(mat, 3, 4))
Matrix =  [[-1, 3, 5, 7], [-6, -3, 1, 4], [-5, -1, -10, 12]]
Count of Negative Numbers =  6

输出

Matrix =  [[-1, 3, 5, 7], [-6, -3, 1, 4], [-5, -1, -10, 12]]
Count of Negative Numbers =  6