> On Fri, May 09, 2014 at 03:07:33PM +0400, Daniil Bratashov wrote: >> On Fri, 9 May 2014 10:48:40 +0000 >> José Coutinho <[email protected]> wrote: >> >>> Dear Gwyddion users, >>> I am looking for a software suitable to look at simulated STM imagery >>> from first principles codes and Gwyddion seems like a great >>> contender. I would like to know if Gwyddion is able to take a volume >>> data file containing the local density of states within >>> LDOS(E+dE,x,y,z), ie, a scalar value on a N1xN2xN3 regular grid, and >>> produce a 2D topographical-like surface, where for each (x,y) >>> coordinate we would have the "highest" z-coordinate (tip heigh) for >>> which LDOS has a user-defined value? Hopefully this would result in >>> an approximate constant-current STM image. Many thanks, /J >> >> In general, yes, but some work will be required there to implement >> data loading and some small work in volume data presentation code. > > The visualisation module should, as intended, be able to do this but it > is a rotting bag of badgers and Petr does not seem to have much time to > develop it futher now... > > If you load the data into Gwyddion as volume data (for which a relatiely > simple import module should suffice) then you can just use the Change > Preview function to get an image of the maximum value. I am not > actually sure if this is relevant because z is once described as the > grid coordinate (in which case the highest value would be constant) and > once as something to plot for (x,y). So I am probably missing > something. > > Regards, > > Yeti > > > ------------------------------------------------------------------------------ > Is your legacy SCM system holding you back? Join Perforce May 7 to find out: > • 3 signs your SCM is hindering your productivity > • Requirements for releasing software faster > • Expert tips and advice for migrating your SCM now > http://p.sf.net/sfu/perforce > _______________________________________________ > Gwyddion-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/gwyddion-users
On 09 May 2014, at 20:43, David Nečas (Yeti) <[email protected]> wrote: Thanks Yeti, Not sure if you understood it right. I meant the maximum z-coordinate that corresponds to a user-defined (constant) LDOS(E+dE,x,y,z). Basically, in STM the tip hoovers over a landscape with approximately constant LDOS. The goal is to convert volume data to topographical data. Hope it helped. regards /J ------------------------------------------------------------------------------ Is your legacy SCM system holding you back? Join Perforce May 7 to find out: • 3 signs your SCM is hindering your productivity • Requirements for releasing software faster • Expert tips and advice for migrating your SCM now http://p.sf.net/sfu/perforce _______________________________________________ Gwyddion-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/gwyddion-users
