How to subtract row means in NumPy and implement it?

Python
#1

I came across this term as I was exploring the different functionalities of NumPy. The term itself means subtracting the mean of each row from each element of the corresponding row in a matrix which I completely understand what are we trying to do and can visualize in my head, though I can’t make out the logic in my head to type out code for it, can anyone help out in this?

1 Like
#2

Sure @safiaa.02, here is an example code that uses the technique of NumPy vectorization to achieve the task you explained:

  • NumPy vectorization is a technique to perform mathematical operations on an array in a faster and more efficient way, by operating on the entire array rather than individual elements.
  • In this example code, the mean of each row of a 3x3 matrix is calculated using np.mean(). Then, NumPy vectorization is used to subtract the row means from each element in the row by adding a new axis to row_means with [:, np.newaxis].

I hope this code is useful and helps you understand the logic of this technique in code!