Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / splines-1.0.7 / csapi.m

diff --git a/octave_packages/splines-1.0.7/csapi.m b/octave_packages/splines-1.0.7/csapi.m
new file mode 100644 (file)
index 0000000..3e47b73
--- /dev/null
+++ b/octave_packages/splines-1.0.7/csapi.m
@@ -0,0 +1,35 @@
+## Copyright (C) 2000  Kai Habel
+##
+## 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, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {@var{pp} = } csapi (@var{x}, @var{y})
+## @deftypefnx {Function File} {@var{yi} = } csapi (@var{x}, @var{y}, @var{xi})
+## cubic spline interpolation
+##
+## @seealso{ppval, spline, csape}
+## @end deftypefn
+
+## Author:  Kai Habel <kai.habel@gmx.de>
+## Date: 3. dec 2000
+
+function ret = csapi (x, y, xi)
+
+  ret = csape(x,y,'not-a-knot');
+
+  if (nargin == 3)
+    ret = ppval(ret,xi);
+  endif
+
+endfunction