L1 Norm

Compute the L1 norm of each row of a matrix.

Given a matrix $X$ of shape $n \times m$ stored in row-major order, compute a vector $Y$ of length $n$ such that each element is the L1 norm of the corresponding row:

Input

• X — input matrix of shape $n \times m$ stored in row-major order.
• n — number of rows in X.
• m — number of columns in X.

Output

• Y — output vector of length n, where each element Y[i] is the L1 norm of row i of X.