110824     DISCRETE  Version: December 1985
 
Author: S. W. Provencher, Max-Planck-Inst.f.biophys.Chemie
 
Submitted by: T. Hoshiko, Case Western Reserve University
 
Operating System: RT-11 V5.01  Source Language: FORTRAN IV  Memory
Required: 24K  Keywords: Mathematical
 
Abstract: DISCRETE, originally written for the IBM 370, is a FORTRAN
IV program for the automatic analysis of data represented by
the sum:
 
Y(k) =    Summation [ A(j)*EXP(-LAM(j)*T(k)) ]
 
for j = 0 to n and k = 1,2, . . . . , n, with n <= 9.
Provision can be made for an unknown baseline component A(0)
with LAM(0) = 0.  Only the raw data (i.e., the Y(k) and T(k)
are input; no potentially biased initial guesses at the
A(j), LAM(j) or the number of exponential terms, n, are
needed or allowed.  Transforms of the data are used to
obtain good starting estimates for least squares analyses of
the data.  DISCRETE is based on a fast and accurate method,
making direct use of the knowledge that the data is being
represented by a discrete sum (rather than an integral over
a continuous distribution of exponentials).
 
DISCRETE is large for a minicomputer and the original
program required about 180Kbytes.  Since the RT-11
single-job monitor accomodates only 45 Kbytes, substantial
changes were required.  The double precision version of
DISCRETE had to be used requiring more space and time for
execution so that this RT-11 version can accomodate only 50
points.
 
Documentation available in hardcopy only.
 
Media (Service Charge Code): User's Manual (EA), One RX01 Diskette
(KA)  Format: RT-11, 600' Magnetic Tape (MA)  Format: RT-11