# Just Launched: You can now import projects and releases from Google Code onto SourceForge

We are excited to release new functionality to enable a 1-click import from Google Code onto the Allura platform on SourceForge. You can import tickets, wikis, source, releases, and more with a few simple steps.

## [cc7e24]: financial / inst / irr.m Maximize Restore History

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39``` ```## Copyright (C) 1995-1998, 2000, 2002, 2004-2007 Kurt Hornik ## ## 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 3 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, see . ## -*- texinfo -*- ## @deftypefn {Function File} {} irr (@var{p}, @var{i}) ## Return the internal rate of return of a series of payments @var{p} ## from an initial investment @var{i} (i.e., the solution of ## @code{npv (r, p) = i}. If the second argument is omitted, a value of ## 0 is used. ## @seealso{npv, pv, rate} ## @end deftypefn function r = irr (p, i = 0) ## Check input if (nargin != 1 && nargin != 2) print_usage (); elseif (! (isvector (p))) error ("irr: p must be a vector"); elseif (! isscalar (i)) error ("irr: i must be a scalar"); endif ## Solve system f = @(x) npv (x, p) - i; r = fsolve (f, 0); endfunction ```