ndi.test.values_within_tolerance

  VALUES_WITHIN_TOLERANCE - check to see if values are within a tolerance

  [B,MSG] = VALUES_WITHIN_TOLERANCE(V1, V2, TOLERANCE, FIELDNAME)

  This function performs a number of checks on the values of arrays V1 and V2.
   a) It checks to make sure the arrays are the same size.
   b) It checks to make sure no values differ by an amount greater than TOLERANCE 

  If both tests pass, then B is 1 and MSG is blank/empty ('').
  If either test fails, then B is 0 and MSG contains an error message as to 
  how it failed.

  Example:
   v1 = [ 1 2 3 ];
   v2 = [ 1 2 3 ];
   v3 = [ 1 2 ];
   v4 = [ 1 2 4];

  [b1,msg1] = ndi.test.values_within_tolerance(v1, v2, 0, 'myfield')
   % b1 is 1, msg1 is ''
  [b2,msg2] = ndi.test.values_within_tolerance(v1, v3, 0, 'myfield')
   % b2 is 0, msg2 is 'Arrays of myfield are not the same size'
  [b3,msg3] = ndi.test.values_within_tolerance(v1, v4, 0, 'myfield')
   % b3 is 0, msg3 is 'Differences in arrays of myfield exceed the tolerance provided (0)'];