make indexing on the matlab side start with 1, changed tests

Author: jgrewe

+nix/SampledDimension.m

@@ -24,6 +24,9 @@
         end
 
         function posAt = position_at(obj, index)
+            if index > 0
+                index = index - 1;
+            end
             func_name = strcat(obj.alias, '::position_at');
             posAt = nix_mx(func_name, obj.nix_handle, uint64(index));
         end
@@ -32,7 +35,9 @@
             if nargin < 3
                 startIndex = 0;
             end
-            
+            if startIndex > 0
+                startIndex = startIndex - 1;
+            end
             func_name = strcat(obj.alias, '::axis');
             axis = nix_mx(func_name, obj.nix_handle, uint64(count), uint64(startIndex));
         end

tests/TestDimensions.m

@@ -63,7 +63,7 @@
     assert(axis(end) == (length(axis) - 1) * d1.samplingInterval + d1.offset);
 
     assert(d1.position_at(0) == d1.offset);
-    assert(d1.position_at(9) == d1.offset + 9 * d1.samplingInterval);
+    assert(d1.position_at(10) == d1.offset + 9 * d1.samplingInterval);
 
     d1.label = '';
     d1.unit = '';
@@ -79,7 +79,7 @@
     assert(axis(end) == (length(axis) - 1) * d1.samplingInterval + d1.offset);
 
     assert(d1.position_at(0) == d1.offset);
-    assert(d1.position_at(9) == d1.offset + 9 * d1.samplingInterval);
+    assert(d1.position_at(10) == d1.offset + 9 * d1.samplingInterval);
 end
 
 function [] = test_range_dimension( varargin )