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Questions on the use of Mathematica to construct models for approximating empirical data.

1 vote
0 answers
118 views

How do I add custom deviation when using LinearModelFit?

I have a set of data in the form a list S1={{x,y},{x,y}} etc. I also have a function that calculates a corrected standard deviation in the y direction for standard deviation in x and y. That funct …
Sponge Bob's user avatar
2 votes
1 answer
511 views

How can I get the coefficient of the exponent from a nonlinear model fit?

I have been trying for over an hour now to get the numeric value for "HalfLifeN" from the code in the screenshot below. Not to mention mathematica simplifies $e^{ln(x)}$ to $ 2^x$, which I don't want …
Sponge Bob's user avatar