Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / nnet-0.1.13 / isposint.m

diff --git a/octave_packages/nnet-0.1.13/isposint.m b/octave_packages/nnet-0.1.13/isposint.m
new file mode 100644 (file)
index 0000000..a41ae5e
--- /dev/null
+++ b/octave_packages/nnet-0.1.13/isposint.m
@@ -0,0 +1,61 @@
+## Copyright (C) 2005 Michel D. Schmid  <michaelschmid@users.sourceforge.net>
+##
+##
+## 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, 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; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} @var{f} = isposint(@var{n})
+## @code{isposint} returns true for positive integer values.
+## 
+## @example
+##   isposint(1)   # this returns TRUE
+##   isposint(0.5) # this returns FALSE
+##   isposint(0)   # this also return FALSE
+##   isposint(-1)  # this also returns FALSE
+## @end example
+##
+## 
+## @end deftypefn
+
+## Author: Michel D. Schmid 
+
+function f = isposint(n)
+
+  ## check range of input arguments
+  error(nargchk(1,1,nargin))
+  
+  ## check input arg
+  if (length(n)>1)
+    error("Input argument must not be a vector, only scalars are allowed!")
+  endif
+
+  f = 1;
+  if ( (!isreal(n)) || (n<=0) || (round(n) != n) )
+    f = 0;
+  endif
+
+
+endfunction
+
+%!shared
+%! disp("testing isposint")
+%!assert(isposint(1)) # this should pass
+%!assert(isposint(0.5),0) # should return zero
+%!assert(isposint(-1),0) # should return zero
+%!assert(isposint(-1.5),0) # should return zero
+%!assert(isposint(0),0) # should return zero
+%!fail("isposint([0 0])","Input argument must not be a vector, only scalars are allowed!")
+%!fail("isposint('testString')","Input argument must not be a vector, only scalars are allowed!")
+