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double precision version of fftpack
rakeshtejak/fftpack
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DFFTPACK V1.0 ***************************************************************** A Double precision clone by Hugh C. Pumphrey of: FFTPACK version 4 april 1985 The gzipped tar file dp.tgz contains a complete copy of the FORTRAN sources of fftpack, with everything converted to double precision. If you do gunzip dp.tgz tar xvf dfftpack.tar You will get a directory called dfftpack with all the source code in it. There is also: (*) a Makefile which I have tweaked to work on modern Linux and Solaris systems. The comments in this file document the changes made. (*) a file doc which was supplied with fftpack and which has been altered to reflect the changes made in the change to double precision. (*) A file doc.double which details the changes I made to the source code Please send any comments or bug reports to hcp@met.ed.ac.uk . Please also report if you get dfftpack to build successfully on any system other than Linux or Solaris. The original FFTPACK was public domain, so dfftpack is public domain too. It is released in the hope it will be useful to someone. There is no warranty of any sort covering this software.
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