On Mon, Mar 22, 2010 at 05:44:39PM +0100, Massimo Vassalli wrote: > I read the post you suggested and I agree that leveling is a critical point > in step height determination. Reasonably, using a profile is simpler and > clearer but in my case I need much more statistics than that I can obtaining > by widening a bit the profile. My step is not straight so I can not use a > wide profile without introducing an unwanted noise near the step; at the > same time I'm interested in obtaining a value over the whole image, because > the deviations around the mean are important (I do not have a very sharp > step). That's why I was thinking on using the height profile.
If the peaks are well separated, fitting each individually (you can select a range on the graph in Fit Curve) should work well although it might be a little cumbersome. Otherwise, I can add a two-Gaussian fitting function if you wish -- though likely with a just very crude initial parameter estimation method as automated multipeak fitting is hard and somewhat marginal for Gwyddion. Regards, Yeti ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Gwyddion-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/gwyddion-users
