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- PROGRAM FFTDEMO
- INCLUDE 'STDHDR.FOR'
-
- REAL xr(0: maxr, 0: maxc)
- REAL yi(0: maxr, 0: maxc)
- INTEGER nd, i,j
-
-
- !!!!!!!!!!!!!!!!!!!!!!!!!!!
- !!!!!!!!!!!!!!!!!!!!!!!!!!!
- ! {main program fft}
- nd = 8
- do i = 0, nd - 1
- do j = 0, nd - 1
- xr(i, j) = COS(pi * i / 4.0) + COS(pi * j / 2.0)
- yi(i, j) = 0.0
- end do
- end do
- CALL showdata(xr, nd)
- CALL FFT2DCalc(xr, yi, nd, nd, 0)
- CALL showdata(xr, nd)
- CALL FFT2DCalc(xr, yi, nd, nd, 1)
- CALL showdata(xr, nd)
-
- END
-
- !!!!!!!!!!!!!!!!!!!!!!!!!!!
- C ****************************
- !!!!!!!!!!!!!!!!!!!!!!!!!!!
- SUBROUTINE showdata (xr, nd)
- INCLUDE 'STDHDR.FOR'
- REAL xr(0: maxr, 0: maxc)
- INTEGER nd, i, j
-
- DO i = 0, nd - 1
- DO j = 0, nd - 1
- WRITE(*,10) xr(i, j)
- END DO
- WRITE (*,*)
- END DO
- 10 FORMAT (F9.3,5X \)
- END !! SUB ShowData
-
-