HP Prime Graphing NW280AAABA manual Lin Returns an expression with the exponentials linearized

length Returns the length of a list, string or set of objects.

length(List) or length(String) or length(Object1, Object2,…)

Example:

length([1,2,3]) gives 3

lgcd Returns the greatest common divisor of a set of integers or polynomials, contained in a list, a vector, or just entered directly as arguments.

lgcd(List) or lgcd(Vector) or lgcd(Integer1, Integer2, …) or lgcd(Poly1, Poly2, …)

Example:

lgcd([45,75,20,15]) gives 5

lin Returns an expression with the exponentials linearized.

lin(Expr)

Example:

lin((exp(x)^3+exp(x))^2) gives exp(6*x)+2*exp(4*x)+exp(2*x)

linear_interpolate Takes a regular sample from a polygonal line defined by a matrix of two rows.

linear_interpolate(Matrix,Xmin,Xmax,Xstep)

Example:

linear_interpolate([[1,2,6,9],[3,4,6,7]],1,9,

1)returns

[[1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0],

[3.0,4.0,4.5,5.0,5.5,6.0,6.33333333333,6.6666

6666667,7.0]

linear_regression Given a set of points, returns a vector containing the coefficients a and b of y=a*x+b, the linear which best fits the set of points. The points may be the elements in two lists or the rows of a matrix.

linear_regression(Matrix) or linear_regression(List1, List2)

Example:

⎛⎜ 1.0 2.0 linear_regression ⎜⎜ 0.0 1.0 ⎝ 4.0 7.0

⎞

⎟

⎟ returns [1.53…, 0.769…]

⎟

⎠

398 Functions and commands