ndim

ndim(dataIn: any[] | Mat | Tensor | number) : number

param dataIn - an Array, Mat or Tensor or even a number.

returns: number - Representing the dimension of the structure.

This function is quite useful as it can handle different cases when size matters. It determines the number of dimensions of a structure. For example, a vector is 1 dimensional. A 2-D array is 2 dimensional. A 3-D Array or 3-D Tensor has 3 dimensions and so on. A number has 0 dimensions.

Note that this is returning the number of dimensions, not the dimensions themselves. So for a matrix of size 3x4, it has 2 dimensions - rows and columns. Thus ndim=2, the size of 3x4 doesn't matter in this function.