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/ IRIX Base Documentation 2001 May / SGI IRIX Base Documentation 2001 May.iso / usr / share / catman / p_man / cat3 / complib / sdfftm1du.z / sdfftm1du
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Text File  |  1998-10-30  |  6.2 KB  |  133 lines

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  4. ssssffffffffttttmmmm1111dddduuuu,,,,ddddffffffffttttmmmm1111dddduuuu((((3333FFFF))))                                    ssssffffffffttttmmmm1111dddduuuu,,,,ddddffffffffttttmmmm1111dddduuuu((((3333FFFF))))
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  8. NNNNAAAAMMMMEEEE
  9.      ddddffffffffttttmmmm1111dddduuuu,,,, ssssffffffffttttmmmm1111dddduuuu ---- Multiple 1D, Real to Complex Fast Fourier Transform.
  10.  
  11. FFFFOOOORRRRTTTTRRRRAAAANNNN SSSSPPPPEEEECCCCIIIIFFFFIIIICCCCAAAATTTTIIIIOOOONNNN
  12.      ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee DDDDFFFFFFFFTTTTMMMM1111DDDDUUUU(((( jjjjoooobbbb,,,, nnnn,,,, pppp,,,, sssseeeeqqqquuuueeeennnncccceeee,,,, iiiinnnncccc,,,, llllddddaaaa,,,, wwwwoooorrrrkkkkssssppppaaaacccceeee ))))
  13.      iiiinnnntttteeeeggggeeeerrrr             jjjjoooobbbb,,,, nnnn,,,, pppp,,,, iiiinnnncccc,,,, llllddddaaaa
  14.      ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn    sssseeeeqqqquuuueeeennnncccceeee((((llllddddaaaa,,,,****)))),,,, wwwwoooorrrrkkkkssssppppaaaacccceeee((((****))))
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  16.      ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee SSSSFFFFFFFFTTTTMMMM1111DDDDUUUU(((( jjjjoooobbbb,,,, nnnn,,,, pppp,,,, sssseeeeqqqquuuueeeennnncccceeee,,,, iiiinnnncccc,,,, llllddddaaaa,,,, wwwwoooorrrrkkkkssssppppaaaacccceeee ))))
  17.      iiiinnnntttteeeeggggeeeerrrr             jjjjoooobbbb,,,, nnnn,,,, pppp,,,, iiiinnnncccc,,,, llllddddaaaa
  18.      rrrreeeeaaaallll                sssseeeeqqqquuuueeeennnncccceeee((((llllddddaaaa,,,,****)))),,,, wwwwoooorrrrkkkkssssppppaaaacccceeee((((****))))
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  21. CCCC SSSSPPPPEEEECCCCIIIIFFFFIIIICCCCAAAATTTTIIIIOOOONNNN
  22.      iiiinnnntttt        ddddffffffffttttmmmm1111dddduuuu(((( iiiinnnntttt jjjjoooobbbb,,,, iiiinnnntttt nnnn,,,, iiiinnnntttt pppp,,,,
  23.                          ddddoooouuuubbbblllleeee ****sssseeeeqqqquuuueeeennnncccceeee,,,, iiiinnnntttt iiiinnnncccc,,,, iiiinnnntttt llllddddaaaa,,,,
  24.                          ddddoooouuuubbbblllleeee ****wwwwoooorrrrkkkkssssppppaaaacccceeee))))
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  26.      iiiinnnntttt        ssssffffffffttttmmmm1111dddduuuu(((( iiiinnnntttt jjjjoooobbbb,,,, iiiinnnntttt nnnn,,,, iiiinnnntttt pppp,,,,
  27.                          ffffllllooooaaaatttt  ****sssseeeeqqqquuuueeeennnncccceeee,,,, iiiinnnntttt iiiinnnncccc,,,, iiiinnnntttt llllddddaaaa,,,,
  28.                          ffffllllooooaaaatttt  ****wwwwoooorrrrkkkkssssppppaaaacccceeee))))
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  33. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  34.      DFFTM1DU and SFFTM1DU compute the complex Fourier transform of P real
  35.      periodic sequences of N samples each.
  36.  
  37.      NOTE: These routines are provided only for compatibility with previous
  38.      releases of complib.
  39.  
  40. PPPPAAAARRRRAAAAMMMMEEEETTTTEEEERRRRSSSS
  41.      JJJJOOOOBBBB ---- IIIINNNNTTTTEEEEGGGGEEEERRRR
  42.      On entry specifies whether to perform a forward or backward Fast Fourier
  43.      Transform:
  44.          JOB = -1,  forward FFT
  45.          JOB =  1,  backward FFT Unchanged on exit.
  46.  
  47.      NNNN ---- IIIINNNNTTTTEEEEGGGGEEEERRRR....
  48.      On entry, N specifies the number of elements in each sequence.  Unchanged
  49.      on exit.
  50.  
  51.      PPPP ---- IIIINNNNTTTTEEEEGGGGEEEERRRR....
  52.      On entry, P specifies the number of sequences.  Unchanged on exit.
  53.  
  54.      SSSSEEEEQQQQUUUUEEEENNNNCCCCEEEE ---- AAAArrrrrrrraaaayyyy....
  55.      Array of DIMENSION ( LDA, p ).  Array containing the (lda*p) elements for
  56.      the FFT.  On exit, SEQUENCE is overwritten by its transform.
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  63.                                                                         PPPPaaaaggggeeee 1111
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  70. ssssffffffffttttmmmm1111dddduuuu,,,,ddddffffffffttttmmmm1111dddduuuu((((3333FFFF))))                                    ssssffffffffttttmmmm1111dddduuuu,,,,ddddffffffffttttmmmm1111dddduuuu((((3333FFFF))))
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  74.      IIIINNNNCCCC ---- IIIINNNNTTTTEEEEGGGGEEEERRRR....
  75.      Increment between two consecutive elements of the sequence.  Unchanged on
  76.      exit.
  77.  
  78.      LLLLDDDDAAAA ---- IIIINNNNTTTTEEEEGGGGEEEERRRR....
  79.      On entry, LDA specifies the first dimension of the array SEQUENCE as
  80.      declared in the calling (sub)program. LDA must be at least max( 1,
  81.      2*((N1+2)/2) ).  Unchanged on exit.
  82.  
  83.      WWWWOOOORRRRKKKKSSSSPPPPAAAACCCCEEEE ---- AAAArrrrrrrraaaayyyy....
  84.      Array of dimension at least ( N + 15  ).  Array containing the
  85.      Sines/Cosines and factorization of N.  WORKSPACE needs to be initialized
  86.      by a call to sfftm1dui or dfftm1dui.
  87.  
  88.  
  89. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  90.      o32fft
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  129.                                                                         PPPPaaaaggggeeee 2222
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