Python numpy Array read-in, storage operations

Loading a ndarray array from a file

• Loads the Ndarray array from the text file Np.loadtxt

  >>># textfile是文本文件

• .npyloads the Ndarray array from or to the .npz file Np.load
  Returns a single Ndarray array if it is a file that ends in. npy
  Returns a dictionary type object, {Filename:array}, if it is a file that ends in. Npz.

  >>># textfile是.npz或.npy结尾的二进制文件

Depositing a ndarray array into a file

• Deposit a single Ndarray array into a binary file Np.save

  >>>= np.arange(10>>># outfile必须以.npy结尾

• Depositing multiple ndarray arrays into a binary file Np.savez

  >>>= np.arange(10>>>= np.sin(x)>>># outfile必须以.npz结尾

• Save the Ndarray array in a text file Np.savetxt

  >>>= np.arange(10>>>= np.sin(x)>>> np.savetext(outfile, x, delimiter=‘,‘# outfile为文本文件>>> np.savetext(outfile, (x,y))>>> np.savetext(outfile, x, fmt=‘%1.4e‘)

Python numpy Array read-in, storage operations