I have height profiles of a material via AFM, and I wanted to compute for the curvature or the radius of curvature of the material. Is there any method to directly compute the curvature of large data?
Assuming data is equally spaced along the profile you could use diff function in MATLAB which would perform well for large arrays:
curvature=diff(height_profile_array,2)
Would be very simple to code yourself too.
I have some graphs, maybe you could help me out on this on just uploading the image and defining the points. Would that function work out?
Yes, it would work. Depending on the smoothness of the profile you would get something like this:
Referring to the answer of Volker: Is the sum of the calculated curvature values of a graph a good indicator for the shape of the graph (convex, concave?
from the example above:
X=sum(diff(height_profile_array,2))
Are general conclusions possible, e.g. if X < 0, the graph has a (mostly?) convec downward shape?
Any suggestions welcome.
- Badges
- Science topic
- Similar topics
- Mathematical Sciences
- Graphs