THIS TAPE CONTAINS TWO PROGRAMS. THE FIRST IS A COMPLEX
RADIX2 FFT WITH UNSCRAMBLING IN PLACE. ADDITIONAL ROUTINES PERMIT
CALCULATING THE FOURIER COEFFICIENTS, OR GENERATING THE TWO SIDED
TRANSFORM FROM COEFFICIENTS PRIOR TO INVERSE TRANSFORMING.
THE SECOND PROGRAM IS A BI-CUBIC SPLINE WITH CONTROL AND
ERROR FEEDBACK THROUGH THE ARGUMENT LIST FOR ADDITIONAL CONTROL.

COMMENT LINES IN THE FORTRAN SOURCE PROGRAM PROVIDE SELL
DOCUMENTING. IN ADDITION BOTH PROGRAM HAVE SAMPLE DRIVERS INCLUDED
ON THE TAPE TO DEMONSTRATE FEATURES.
IN ADDITION TO THE SOURCE FILES FOR BOTH THE ROUTINES AND
DRIVERS, OBJECT FILES FOR BOTH F4P AND F77 ARE INCLUDED. ALL OF THE
OBJECT FILES WERE CREATED USING THE /FP SWITCH AND NONE ARE LINKED
TO ANY RESIDENT LIBRARIES.
TASK IMAGES TO RUN ON A MAPPED PDP 11/70 UNDER RSX 11-M
V3.2D OR LATER OR V4.0 ARE ALSO INCLUDED.

THESE PROGRAMS ARE PROVIDED WITHOUT SUPPORT. NEITHER
C.B.S.- CTC NOR I CAN PROVIDE SUPPORT. BOTH PROGRAMS HAVE BEEN
USED FOR AN EXTENDED PERIOD AND SEEM TO WORK WELL.
IF YOU HAVE ANY DIFFICULTY USING EITHER PROGRAM, FEEL FREE
TO WRITE OR PHONE BUT HELP CANNOT BE PROMISED.
IF YOU FIND ANY BUGS PLEASE LET ME KNOW AND I WILL ATTEMPT
A FIX. NOTHING'S GAURENTEED BUT I REALLY BELIEVE BOTH OF THESE ARE
BUG FREE. (I'LL PROBABLY LIVE TO EAT THOSE WORDS). ANYWAY I WOULD
LIKE TO HEAR FROM ANYONE THAT FINDS THEM USEFUL.

BENSON ACKERMAN
MGR. SYSTEMS ANALYSIS
C. B. S. TECHNOLOGY CENTER
227 HIGH RIDGE ROAD
STAMFORD CT. O6905
TEL: (203) 327-2000