How do I use a cfit or very small numbers in a simulink matlab function?

I am trying to use a cfit (2. polynominal) in a simulink matlab function. A simple From Workspace block for the Coefficients does not work , because one Coefficient is too small (e-12). Any ideas?

Reading Coefficients from file works but increases execution time by factor 4.

Answer 1

[Tobias Held]

Use cfit see this answer.

Alternativly make a normalized fit and edit the createFit function like I answered here