Thank you for this, however, it's quite often in machine learning that X is used rather than x.
A capital instead of a small letter.
This is because in mathematics a matrix (or tensor) is usually represented by a capital (e.g. X is often a matrix/tensor) where as a vector is often represented as a lower case letter (e.g. y is often a vector).
Though this is confusing in ML since X can also often be a vector.
Hi @WildanJR09 ,
Thank you for this, however, it's quite often in machine learning that
Xis used rather thanx.A capital instead of a small letter.
This is because in mathematics a matrix (or tensor) is usually represented by a capital (e.g.
Xis often a matrix/tensor) where as a vector is often represented as a lower case letter (e.g.yis often a vector).Though this is confusing in ML since
Xcan also often be a vector.See more here: https://www.britannica.com/science/matrix-mathematics