On Sun, Sep 11, 2011 at 03:58:54PM +0200, Jakob A. S. Meyer wrote:
> I'm analysis AFM data on some self-assaembled thin films. I've found
> that different regions have different coverage by integrating height
> distributions. Now I'd like to say if the different regions have the
> same number of molecules and thus only the film thickness/homogeneity
> varies. Or if there are actually different amounts of molecules in the
> different regions.
>
> I'm thinking that if I divide the data into slaps along the vertical
> axis and can get the occupied volume in each slap, that will do. But
> how to do that?
IIUC what you want to do, the volume occupied by matter within each slab
is
slab-volume × fraction-occupied-by-material
The slab volume is simply the image area times slab thickness and the
fraction equals to the cumulative height distribution
http://gwyddion.net/documentation/user-guide-en/statistical-analysis.html#height-angle-distribution
caulculated by the statistical functions tool.
Hope it helps,
Yeti
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