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/ IRIX Base Documentation 2001 May / SGI IRIX Base Documentation 2001 May.iso / usr / share / catman / p_man / cat3 / complib / sdfft2dui.z / sdfft2dui
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Text File  |  1998-10-30  |  3.9 KB  |  67 lines
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  4. ssssfffffffftttt2222dddduuuuiiii,,,,ddddfffffffftttt2222dddduuuuiiii((((3333FFFF))))                                    ssssfffffffftttt2222dddduuuuiiii,,,,ddddfffffffftttt2222dddduuuuiiii((((3333FFFF))))
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  8. NNNNAAAAMMMMEEEE
  9.      ssssfffffffftttt2222dddduuuuiiii,,,, ddddfffffffftttt2222dddduuuuiiii ---- 2D FFT Real to Complex workspace initialization
  10.      routines.
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  12. FFFFOOOORRRRTTTTRRRRAAAANNNN SSSSPPPPEEEECCCCIIIIFFFFIIIICCCCAAAATTTTIIIIOOOONNNN
  13.      ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee SSSSFFFFFFFFTTTT2222DDDDUUUUIIII(((( nnnn1111,,,, nnnn2222,,,, wwwwoooorrrrkkkkssssppppaaaacccceeee ))))
  14.      iiiinnnntttteeeeggggeeeerrrr              nnnn1111,,,, nnnn2222
  15.      rrrreeeeaaaallll                 wwwwoooorrrrkkkkssssppppaaaacccceeee((((****))))
  16.  
  17.      ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee DDDDFFFFFFFFTTTT2222DDDDUUUUIIII(((( nnnn1111,,,, nnnn2222,,,, wwwwoooorrrrkkkkssssppppaaaacccceeee ))))
  18.      iiiinnnntttteeeeggggeeeerrrr              nnnn1111,,,, nnnn2222
  19.      ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn     wwwwoooorrrrkkkkssssppppaaaacccceeee((((****))))
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  22. CCCC SSSSPPPPEEEECCCCIIIIFFFFIIIICCCCAAAATTTTIIIIOOOONNNN
  23.      ffffllllooooaaaatttt     ****ssssfffffffftttt2222dddduuuuiiii(((( iiiinnnntttt nnnn1111,,,, iiiinnnntttt nnnn2222,,,, ffffllllooooaaaatttt  ****wwwwoooorrrrkkkkssssppppaaaacccceeee))))
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  25.      ddddoooouuuubbbblllleeee    ****ddddfffffffftttt2222dddduuuuiiii(((( iiiinnnntttt nnnn1111,,,, iiiinnnntttt nnnn2222,,,, ddddoooouuuubbbblllleeee ****wwwwoooorrrrkkkkssssppppaaaacccceeee))))
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  28. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  29.      SFFT2DUI and DFFT2DUI initialize the array WORKSPACE which is used in
  30.      SFFT2DU and DFFT2DU. The prime factorizations of N1 and N2, together with
  31.      a tabulation of the trigonometric functions are computed and stored in
  32.      WORKSPACE.
  33.  
  34.      NOTE: These routines are provided only for compatibility with previous
  35.      releases of complib.
  36.  
  37. PPPPAAAARRRRAAAAMMMMEEEETTTTEEEERRRRSSSS
  38.      NNNN1111 ---- IIIINNNNTTTTEEEEGGGGEEEERRRR....
  39.      On entry, N1 specifies the number of elements in the first dimension of
  40.      the sequence to be transformed.  Unchanged on exit.
  41.  
  42.      NNNN2222 ---- IIIINNNNTTTTEEEEGGGGEEEERRRR....
  43.      On entry, N2 specifies the number of elements in the second dimension of
  44.      the sequence to be transformed.  Unchanged on exit.
  45.  
  46.      WWWWOOOORRRRKKKKSSSSPPPPAAAACCCCEEEE ---- AAAArrrrrrrraaaayyyy....
  47.      A work array which must be dimensioned at least (N1+15)+ 2*(N2+15).
  48.  
  49.      On exit, WORKSPACE will contain the prime factorizations of N1 and N2,
  50.      together with a tabulation of the trigonometric functions.
  51.  
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  53. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  54.      o32fft
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  63.                                                                         PPPPaaaaggggeeee 1111
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