dlagf01
Conversions of these routines into Matlab.From:http://pubs.usgs.gov/of/1995/ofr-95-0077/of-95-77.htmlAnderson, W.L, 1983, Fourier cosine and sine transforms using lagged convolutions in double-precision (Subprograms DLAGFO/DLAGF1): U.S. Geological Survey Open-File Report 83-320, 38 p. 026 DLAGF0/ DLAGF1 Fourier cosine/sine transforms (in double-precision). Numerical integration by lagged convolution. USGS Open-File Report 83-320 (1983) Fortran-77:VAX-11/780 (VMS) Subroutine Package
%%%%%%%%%%%%%
From the help:
%C THE PURPOSE OF SUBPROGRAM DLAGF0 IS TO PROVIDE IN DOUBLE PRECISION
%C A GENERAL ALGORITHM FOR FAST FOURIER COSINE TRANSFORMS OF THE FORM:
%C INTEGRAL FROM 0 TO INFINITY OF FUN(G)*DCOS(B*G)*DG, WHERE WE LAG B
%C IN[BMIN,BMAX]--USING IMPLIED VALUE OF BMIN=BMAX*DEXP(-.1*(NB-1)).
%C
%C DLAGF0 USES A NEW DOUBLE-PRECISION COSINE DIGITAL FILTER FOR USE
%C IN LAGGED CONVOLUTION, WHERE THE ALGORITHM IS PATTERNED AFTER THE
%C DOUBLE-PRECISION HANKEL TRANSFORM ROUTINE DHANKL PUBLISHED IN THE
%C FOLLOWING REFERENCE:
%C
%C ANDERSON, W.L., 1982, FAST HANKEL TRANSFORMS USING RELATED AND LAGGED
%C CONVOLUTIONS: ACM TRANS. ON MATH. SOFTWARE, V.8, N.4, P.344-368.
%C
%C DLAGF0 USES THE LAGGED CONVOLUTION METHOD IN THE ABOVE REFERENCE,
%C BUT USES INTERNAL WORK ARRAYS DWORK(787) AND KEY(787)--INSTEAD OF
%C PASSING DWORK IN THE CALLING SEQUENCE AS IN DHANKL. THE MINIMUM
%C RELATIVE AND/OR ABSOLUTE ERRORS ARE ABOUT 10**-10 USING TOL<=10**-12.
Zitieren als
Ben Barrowes (2024). dlagf01 (https://www.mathworks.com/matlabcentral/fileexchange/11556-dlagf01), MATLAB Central File Exchange. Abgerufen .
Kompatibilität der MATLAB-Version
Plattform-Kompatibilität
Windows macOS LinuxKategorien
- Signal Processing > Signal Processing Toolbox > Transforms, Correlation, and Modeling > Correlation and Convolution >
Tags
Quellenangaben
Inspiriert: dlagf0
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!Live Editor erkunden
Erstellen Sie Skripte mit Code, Ausgabe und formatiertem Text in einem einzigen ausführbaren Dokument.
dlagf01/
Version | Veröffentlicht | Versionshinweise | |
---|---|---|---|
1.0.0.0 | small changes, better description |