HP 40G manual Randmat, Redim, Scaleadd, Swapcol, Swaprow

RANDMAT	Creates random matrix with a specified number of rows and
	columns and stores the result in name
	(name must be M0...M9). The entries will be integers
	ranging from –9 to 9.
	RANDMAT name;rows;columns
REDIM	Redimensions the specified matrix or vector to size. For a
	matrix, size is a list of two integers {n1,n2}. For a vector, size
	is a list containing one integer {n}.
	REDIM name;size
REPLACE	Replaces portion of a matrix or vector stored in name with an
	object starting at position start. start for a matrix is a list
	containing two numbers; for a vector, it is a single number.
	Replace also works with lists and graphics.
	REPLACE name;start;object
SCALE	Multiplies the specified row_number of the specified matrix
	by value.
	SCALE name;value;rownumber
SCALEADD	Multiplies the row of the matrix name by value, then adds this
	result to the second specified row.
	SCALEADD name;value;row1;row2
SUB	Extracts a sub-object—a portion of a list, matrix, or graphic
	from object—and stores it into name. start and end are each
	specified using a list with two numbers for a matrix, a number
	for vector or lists, or an ordered pair, (X,Y), for graphics.
	SUB name;object;start;end
SWAPCOL	Swaps Columns. Exchanges column1 and column2 of the
	specified matrix.
	SWAPCOL name;column1;column2
SWAPROW	Swap Rows. Exchanges row1and row2 in the specified
	matrix.
	SWAPROW name;row1;row2

15-24 Programming