Data manipulation in Python is nearly synonymous with NumPy array manipulation: even newer tools like Pandas (Chapter 3) are built around the NumPy array. ... <看更多>

Numpy matrices are strictly 2-dimensional, while numpy arrays (ndarrays) are N-dimensional. Matrix objects are a subclass of ndarray, ... ... <看更多>

in the future. Returns a matrix from an array-like object, or from a string of data. ... <看更多>

The relevant part of numpy for us here is the matrix constructor (yes, np.matrix is a python class below the hood). In a summary from the NumPy code we see: ... <看更多>

This section will present several examples of using NumPy array manipulation to access data and subarrays, and to split, reshape, and join the arrays. While the ... ... <看更多>