"Nasser M. Abbasi" wrote in message <email@example.com>... > On 12/3/2012 7:08 AM, Javier wrote: > > Hi, I have several 3D lines to analyze a structure. The problem is > >that these coordinates aren't integer, for example 1.9 and I have the error: > > Subscript indices must either be real positive integers or logicals. > > > > I don't want to ceil, floor or round, cause if I do this the lines > >are modified, how could I access to these coordinates without changing the line? > > you seem to be using the value itself as an index. > use the location of the value as index. Not the value itself. > > --Nasser
I use x = x0 + t*dx y = y0 + t*dy z = z0 + t*dz with t: 0:0.1:1, and d the direction vector. This is the value of the coordinate isn't it?