Averaging over every n elements of a numpy array

by

If your array arr has a length divisible by 3:

np.mean(arr.reshape(-1, 3), axis=1)

Reshaping to a higher dimensional array and then performing some form of reduce operation on one of the additional dimensions is a staple of numpy programming.

More Related Contents:

  1. Cartesian product of x and y array points into single array of 2D points
  2. Indexing one array by another in numpy
  3. Finding local maxima/minima with Numpy in a 1D numpy array
  4. String concatenation of two pandas columns
  5. How to write a multidimensional array to a text file?
  6. Matplotlib: save plot to numpy array
  7. Find column name in pandas that matches an array
  8. Reshape an array in NumPy
  9. find length of sequences of identical values in a numpy array (run length encoding)
  10. Is it possible to vectorize recursive calculation of a NumPy array where each element depends on the previous one?
  11. ImportError in importing from sklearn: cannot import name check_build
  12. binning data in python with scipy/numpy
  13. How do I count the occurrence of a certain item in an ndarray?
  14. Transform a set of numbers in numpy so that each number gets converted into a number of other numbers which are less than it
  15. Calculating Pearson correlation and significance in Python
  16. NumPy array initialization (fill with identical values)
  17. Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
  18. Missing data, insert rows in Pandas and fill with NAN
  19. How to convert a .wav file to a spectrogram in python3
  20. Searching a sequence in a NumPy array
  21. How to split a numpy array in fixed size chunks with and without overlap?
  22. Efficient distance calculation between N points and a reference in numpy/scipy
  23. NumPy: Logarithm with base n
  24. How to display progress of scipy.optimize function?
  25. How to get the values from a NumPy array using multiple indices
  26. Fitting a Weibull distribution using Scipy
  27. How to use sklearn fit_transform with pandas and return dataframe instead of numpy array?
  28. numpy array TypeError: only integer scalar arrays can be converted to a scalar index
  29. Efficient dot products of large memory-mapped arrays
  30. mean from pandas and numpy differ

Leave a Comment