Thanks for the reply. The values that I read (for instance, in Statistical
Quantities) sometimes will only display two significant digits. I'm trying
to measure average height differences from VSI data (in the nm-range), but
the displayed value for Average Height in Statistical Quantities would be
for example "1.2 µm". I also find that the precision displayed varies
between data from same measurement or data set (sometimes, it would be
X.XXX µm, but I can't seem to be able to control it). For example, if I
crop the image, the precision in the displayed readings change. It would be
useful if there is a way to set the precision in the reported measures. Is
there a current work-around to this?
The various functions in Gwyddion look really good, and it'd really be
great if I can maximize them. Thank you very much!
-Erika
On Mon, Oct 3, 2016 at 1:39 AM David Nečas (Yeti) <[email protected]> wrote:
> On Fri, Sep 30, 2016 at 06:34:57PM +0000, Erika Callagon wrote:
> > I've been working on VSI data, and I'm wondering if there is a way to
> > change the units displayed (which is by default in m, at least for my
> data)
> > to nm. Changing the color scale and doing a 'fix mean zero' changes the
> > units to microns, but with only one decimal place. I'm trying to measure
> > nm-level height changes, but the data is not displayed up to this
> precision
> > (the original data contains this information).
>
> The information definitely is not lost in Gwyddion as it represents
> everything in double precision internally (about 16 significant digits).
>
> The colour scale generally covers the entire data range so the precision
> of values displayed there is just sufficient to distinguish the dozen
> tick marks displayed. It serves for orientation, not for value reading
> to many significant digits.
>
> As for reading, in value reading, distance, ... tools, values are
> typically displayed with 4 digits (and exported with an extra one).
> So you have 10-micron range data and need to read sub-nanometer
> differences?
>
> Yeti
>
>
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> _______________________________________________
> Gwyddion-users mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/gwyddion-users
>
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, SlashDot.org! http://sdm.link/slashdot
_______________________________________________
Gwyddion-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/gwyddion-users
