How to “scale” a numpy array?

by

You should use the Kronecker product, numpy.kron:

Computes the Kronecker product, a composite array made of blocks of the second array scaled by the first

import numpy as np
a = np.array([[1, 1],
              [0, 1]])
n = 2
np.kron(a, np.ones((n,n)))

which gives what you want:

array([[1, 1, 1, 1],
       [1, 1, 1, 1],
       [0, 0, 1, 1],
       [0, 0, 1, 1]])

More Related Contents:

  1. How to print the full NumPy array, without truncation?
  2. Convert Python sequence to NumPy array, filling missing values
  3. Numpy array assignment with copy
  4. numpy matrix vector multiplication [duplicate]
  5. Repeating each element of a numpy array 5 times
  6. how does multiplication differ for NumPy Matrix vs Array classes?
  7. Ambiguity in Pandas Dataframe / Numpy Array “axis” definition
  8. How to split/partition a dataset into training and test datasets for, e.g., cross validation?
  9. How to create a numpy array of arbitrary length strings?
  10. Numpy modify array in place?
  11. Subsetting a 2D numpy array
  12. How to normalize a 2-dimensional numpy array in python less verbose?
  13. What is the difference between ndarray and array in NumPy?
  14. Removing elements from an array that are in another array
  15. Creating same random number sequence in Python, NumPy and R
  16. Stocking large numbers into numpy array
  17. check for identical rows in different numpy arrays
  18. pd.Timestamp versus np.datetime64: are they interchangeable for selected uses?
  19. Numpy: For every element in one array, find the index in another array
  20. Prevent numpy from creating a multidimensional array
  21. Inverting a numpy boolean array using ~
  22. Numpy minimum in (row, column) format
  23. Convert NumPy array to 0 or 1 based on threshold
  24. Cannot understand numpy argpartition output
  25. Using numpy ‘module’ object has no attribute ‘array’ [duplicate]
  26. Python: Split NumPy array based on values in the array
  27. Python, OpenCV: Increasing image brightness without overflowing UINT8 array
  28. Numpy shuffle multidimensional array by row only, keep column order unchanged
  29. Randomly select from numpy array
  30. argsort for a multidimensional ndarray

Leave a Comment