Hp Prime Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 332)

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101

328 Functions and commands

Inverse Laplace Returns the inverse Laplace transform of an expression.

invlaplace(Expr,[Var],[IlapVar])

Example:

ilaplace(1/(x^2+1)^2) returns ((-x)*cos(x))/

2+sin(x)/2

FFT With one argument, returns the discrete Fourier transform in R.

fft(Vect)

With three arguments, returns the discrete Fourier transform in

the field Z/pZ, with a as primitive nth root of 1 (n=size(L)).

fft((Vect(L),Intg(a),Intg(p))

Example:

fft([1,2,3,4,0,0,0,0]) gives [10.0,-

0.414213562373-7.24264068712*(i),-

2.0+2.0*i,2.41421356237-1.24264068712*i,-

2.0,2.41421356237+1.24264068712*i,-2.0-2.0*i]

Inverse FFT Returns the inverse discrete Fourier transform.

ifft(Vect)

Example:

ifft([100.0,-52.2842712475+6*i,-

8.0*i,4.28427124746-

6*i,4.0,4.28427124746+6*i,8*i,-52.2842712475-

6*i])

gives

[0.99999999999,3.99999999999,10.0,20.0,25.0,2

4.0,16.0,-6.39843733552e-12]

Solve

Solve Returns the solutions to a polynomial equation or a set of

polynomial equations.

solve(Expr,[Var])

Example:

solve(x^2-3=1) gives list[-2,2]

1 2 ... 327 328 329 330 331 332 333 334 335 336 337 ... 607 608

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