HP Prime Graphing NW280AAABA PolygonscatterplotMatrix, PolynomialregressionList1, List2, Integer

polygonscatterplot Used in the Geometry app Symbolic view. Given an n × m matrix, draws and connects the points (xk, yk), where xk is the element in row k and column 1, and yk is the element in row k and column j (with j fixed for k=1 to n rows). Thus, each column pairing generates its own figure, resulting in m-– figures.

polygonscatterplot(Matrix)

Example:

	⎛	1	2 3	⎞
polygonscatterplot	⎜			⎟	draws two figures, each
	⎜⎜	2	0 1	⎟⎟
	⎝	–1 2 3		⎠

with three points connected by segments.

polynomial_ Given a set of points defined by two lists, and a positive regression integer n, returns a vector containing the coefficients (an, an–1

... a0) of y = an*xn + an–1xn–1+ ... a1*x + a0), the nth order polynomial which best approximates the given points.

polynomial_regression(List1, List2, Integer)

Example:

polynomial_regression({1, 2, 3, 4}, {1, 4, 9, 16},3) returns [0 1 0 0]

POLYROOT Returns the zeros of the polynomial given as argument (either as a symbolic expression or as a vector of coefficients).

POLYROOT(Poly) or POLYROOT(Vector)

Example:

POLYROOT([1 0 -1]) returns [-1 1]

potential Returns a function whose gradient is the vector field defined by a vector and a vector of variables.

potential(Vector1, Vector2)

Example:

potential([2*x*y+3,x^2-4*z,-4*y],[x,y,z]) returns x2*y+3*x-4*y*z

Functions and commands 407