HP Prime Graphing NW280AAABA manual Rref matrix, 3,2,3,4, IDENMATsize

RREF Reduced Row-Echelon Form. Changes a rectangular matrix to its reduced row-echelon form.

RREF(matrix)
Example:
	⎛			⎞
RREF		1 –2	1		returns	1 0 0.2
	⎜			⎟
	⎝	3 4	–1	⎠		0 1 –0.4

Create

Make Creates a matrix of dimension rows × columns, using expression to calculate each element. If expression contains the variables I and J, then the calculation for each element substitutes the current row number for I and the current column number for J. You can also create a vector by the number of elements (e) instead of the number of rows and columns.

MAKEMAT(expression, rows, columns)

MAKEMAT(expression, elements)

Examples:

MAKEMAT(0,3,3) returns a 3 × 3 zero matrix, [[0,0,0],[0,0,0],[0,0,0]].

MAKEMAT(√2,2,3) returns the 2 × 3 matrix [[√2,√2,√2],[√2,√2,√2]].

MAKEMAT(I+J–1,2,3)returns the 2 × 3 matrix

[[1,2,3],[2,3,4]]

Note in the example above that each element is the sum of the row number and column number minus 1.

MAKEMAT(√2,2) returns the 2-element vector [√2,√2].

Identity Identity matrix. Creates a square matrix of dimension size × size whose diagonal elements are 1 and off- diagonal elements are zero.

IDENMAT(size)

476 Matrices