Matrix Initialization

This can be done in two major ways:

Via the class constructor

The Matrix class constructor accepts two forms of arguments:

1. Given two positive integers; the number of rows and columns respectively.
   • Matrix(rows, cols)
   • initializes as a null matrix of the given dimension.
2. Given a 2-D iterable of real numbers.
   • Matrix(array, zfill=False)
   • If all rows have the same length, the matrix is initialized taking the array in row-major order.
   • If row lengths don’t match but zfill is True, the rows of the resulting matrix are padded with zeros to the right to match up.

NOTE: The constructor arguments can only be passed positionally, not by keyword.

Using the provided utility functions

The library provided the following functions at the top level for generating matrix instances:

1. unit_matrix(n)
   • Returns a “n by n” unit matrix.
2. randint_matrix(nrow, ncol, _range)
   • Returns a matrix with random integer elements where the third argument (_range) should be a range instance representing the range of integers from which the random elements are to be selected.
   • All arguments must be positional.
3. random_matrix(nrow, ncol, start, stop)
   • Returns a matrix with random floating-point elements where:
     • start is the minimum value of an element.
     • stop is the maximum value of an element.
   • All arguments must be positional.