110078 DFWFT: Discrete Fast Walsh-Fourier Transform Subroutine Version: March 1973 Author: Urs R. Wyss and Reto Bardola, Institut fuer Hirnforschung, University of Zurich, Switzerland Submitted by: Urs R. Wyss, Institut fuer Hirnforschung, Switzerland Operating System: DOS/BATCH V004A Source Language: PAL-11R Keywords: Mathematical, Scientific Applications Abstract: DFWFT is a subroutine written for the PDP-11/20 for performing a forward or inverse Discrete Fast Walsh-Fourier Transform of N real data elements, where N is a power of 2 in the range of 8 less than or equal to N less than or equal to 16384. A sample size of 1024 elements is transformed in 357 msec (0.357 sec). 560 words of core storage is required for the control section (subroutine), and N words for the data section. The source module is written for the DOS-11 environment, minor changes are required for a paper tape system. DFWFT may be invoked as a FORTRAN subroutine. Media (Service Charge Code): Write-Up and Listing (DA), One RX01 Diskette (KA) Format: RT-11, 600' Magnetic Tape (MA) Format: DOS-11 MEDIA FORMAT MUST BE SPECIFIED ON ORDER FORM

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