nrad2

NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
BUGS
COPYRIGHT
AUTHOR

NAME

nrad2 - subroutine to determine the first power of 2 larger than npts.

SYNOPSIS

call nrad2(npts, npr2)

DESCRIPTION

Basic Seismic Utilities (BSU) computes first power of two larger than an input variable, npts. The subroutine is useful in padding a signal for radix 2 FFT by Robinson’s nlogn.f code. The result, npr2, will be the length that one would pad a complex signal out to.
Fortran Version
.

Arguments
npts (int)

Number of samples in a trace

npr2 (int)

Returned value (power of two) just larger than npts.

EXAMPLE:
call nrad2(1000,npr2)

For an input value of 1000, the routine will return 1024 (next power of 2 larger than 1000).

SEE ALSO

nlogn(3), flist(3), traplt(1)

BUGS

No known bugs.

COPYRIGHT

Copyright © 2024 by Paul Michaels

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

AUTHOR

P. Michaels, PE. <paulmichaels@.boisestate.edu>