1 ## Copyright (C) 2005 Michel D. Schmid <michaelschmid@users.sourceforge.net>
4 ## This program is free software; you can redistribute it and/or modify it
5 ## under the terms of the GNU General Public License as published by
6 ## the Free Software Foundation; either version 2, or (at your option)
9 ## This program is distributed in the hope that it will be useful, but
10 ## WITHOUT ANY WARRANTY; without even the implied warranty of
11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 ## General Public License for more details.
14 ## You should have received a copy of the GNU General Public License
15 ## along with this program; see the file COPYING. If not, see
16 ## <http://www.gnu.org/licenses/>.
19 ## @deftypefn {Function File} {} @var{f} = isposint(@var{n})
20 ## @code{isposint} returns true for positive integer values.
23 ## isposint(1) # this returns TRUE
24 ## isposint(0.5) # this returns FALSE
25 ## isposint(0) # this also return FALSE
26 ## isposint(-1) # this also returns FALSE
32 ## Author: Michel D. Schmid
34 function f = isposint(n)
36 ## check range of input arguments
37 error(nargchk(1,1,nargin))
41 error("Input argument must not be a vector, only scalars are allowed!")
45 if ( (!isreal(n)) || (n<=0) || (round(n) != n) )
53 %! disp("testing isposint")
54 %!assert(isposint(1)) # this should pass
55 %!assert(isposint(0.5),0) # should return zero
56 %!assert(isposint(-1),0) # should return zero
57 %!assert(isposint(-1.5),0) # should return zero
58 %!assert(isposint(0),0) # should return zero
59 %!fail("isposint([0 0])","Input argument must not be a vector, only scalars are allowed!")
60 %!fail("isposint('testString')","Input argument must not be a vector, only scalars are allowed!")