Hp Prime Graphing Wireless Calculator Bedienungsanleitung PDF herunterladen (Seite 215)

Functions and commands 211

type Returns the type of an expression (e.g. list, string).

type(Expr)

Example:

type("abc") gives DOM_STRING

unapply Returns the function defined by an expression and a variable.

unapply(Expr,Var)

Example:

unapply(2*x^2,x) gives (x)→2*x^2

valuation Returns the valuation (degree of the term of lowest degree) of

a polynomial. With only a polynomial as argument, the

valuation returned is for x. With a variable as second

argument, the valuation is performed for it.

valuation(Poly,[Var])

Example:

valuation(x^4+x^3) gives 3

variance Returns the variance of a list or the list of variances of the

columns of a matrix. The optional second list is a list of

weights.

variance(List1, [List2]) or variance(Matrix)

Example:

variance({3, 4, 2}) returns 2/3

vpotential Given a vector V and a vector of variables, returns the vector

U such that curl(U)=V.

vpotential(Vector1, Vector2)

Example:

vpotential([2*x*y+3,x

-4*z,-2*y*z],[x,y,z])

returns

when Used to introduce a conditional statement.

XOR Exclusive or. Returns 1 if the first expression is true and the

second expression is false or if the first expression is false and

the second expression is true. Returns 0 otherwise.

Expr1 XOR Expr2

0 2– x⋅ yz 4 xz⋅⋅

---

3 y⋅+⋅–⋅⋅

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Hp Prime Graphing Wireless Calculator Bedienungsanleitung Seite 215