HP 40G manual Matrices, Vectors, Matrix Variables

12

Matrices

Introduction

You can perform matrix calculations in HOME and in programs. The matrix and each row of a matrix appear in brackets, and the elements and rows are separated by commas. For example, the following matrix:

		1 2 3
		4 5 6
	is displayed in the history as:
	[[1,2,3],[4,5,6]]
	(If the Decimal Mark in MODES is set to Comma, then the
	row separators are periods.)
	You can enter matrices directly in the command line, or create
	them in the matrix editor.
Vectors	Vectors are one-dimensional arrays. They are composed of
	just one row. A vector is represented with single brackets; for
	example, [1,2,3]. A vector can be a real number vector or a
	complex number vector, for example [(1,2), (7,3)].
Matrices	Matrices are two-dimensional arrays. They are composed of
	more than one row and more than one column. Two-
	dimensional matrices are represented with nested brackets;
	for example, [[1,2,3],[4,5,6]]. You can create complex
	matrices, for example, [[(1,2), (3,4)], [(4,5), (6,7)]].
Matrix Variables	There are ten matrix variables available, named M0 to M9.
	You can use them in calculations in HOME or in a program.
	You can retrieve the matrix names from the VARS menu, or
	just type their names from the keyboard.

Matrices 12-1