[Course -1 Week 3] Quiz Question

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
1

X is a matrix in which each column is one training example.
How is it so? I thought Dimension of X was (n,m) where n= number of training examples and m = number of input features.

2

It is a matter of choice. If you define X as the number of training examples times input features, equations change, for example:

A = W X + b
would become
A = X W + b etc.

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