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Speaking as a mathematician rather than an NMR person if a spectrum dimension has "fundamental region" say 112 to 130 ppm, and I have picked a peak to be at 108 ppm then that is where the peak is and where "follow peak" should go. The peak in the fundamental region is at 125 ppm say. In the current way of drawing things the 108 peak is drawn with solid line and the 125 peak is drawn with dashed lines. If you want to work with the 125 peak rather than the 108 peak then perhaps it is best to make that the real peak (by changing numAliasing from 1 to 0). Maybe you accidentally picked the 108 peak because it was in the way of picking another spectrum's real peaks, and you really want it to be at 125. I don't know. Anyway I suspect we might also have a conflict of terminology/meaning in all this discussion so perhaps best to discuss/draw pictures in Ambleside. Wayne On Fri, 13 Aug 2004, Brian Smith wrote: > Tim, > > On Fri, 13 Aug 2004, Tim Stevens wrote: > > > This is a 'feature', i.e. how Wayne and I wanted things, but I can see > > how this may be going against some traditional grain. > > > > In our resonance-centric world, we believe that the user should go to 108 > > ppm if the shift is at 108 ppm. Because you can tile spectra (in spectrum > > referencing set min and max ppm values) you can navigate between spectra > > with different spectral widths and always find contours. > > I can see your reasoning. However, I think that tiling is some way from > being fully useful (no +ve/-ve contour alternation in tiles, increased > overhead of drawing extra contours, user confusion, etc.) and for some > cases is never going to be the handiest way of doing things. Your > argument works if the function was "following" a resonance, but it's not, > it's "following" a peak object. I would consider that since the peak knows > that it belongs to a particular spectrum and also knows whether it's > aliased, "following" a peak should take you to the bit of data that > allowed the peak to be picked in the first place. > > Brian > > -- > Dr. Brian O. Smith ---------------------- B.Smith at bio.gla.ac.uk > Division of Biochemistry & Molecular Biology, > Institute Biomedical & Life Sciences, > Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, UK. > Tel: 0141 330 5167/6459 Fax: 0141 330 8640 >