DEFINITION MODULE Fourier ;
(* 
   (C) Michael Kowalik & PASCAL INTERNATIONAL

   x   - vector of points projected on abscissa
   y   - vector of points projected on ordinate
   a,b - vectors of Fourier's coefficients
   a[i]*cos(2*pi*x[i]/T)
   b[i]*sin(2*pi*x[i]/T)
 *)
EXPORT QUALIFIED Interpolation, RungeFaltung, DFT, FFT;
PROCEDURE Interpolation(VAR x, y, a, b : ARRAY OF REAL);
PROCEDURE RungeFaltung(VAR x, y, a, b : ARRAY OF REAL);
PROCEDURE DFT(VAR x, y, a, b : ARRAY OF REAL);
PROCEDURE FFT(VAR x, y, a, b : ARRAY OF REAL)
END Fourier.
