I need to do a regression on the following equation:
I = 1 + A(1-exp(-t/T))
The known variables are I, t & T. The unknown is A. Is there a way to
feed this equation into the Regression box?
Are there any add-ins that will do non-linear regressions?
Currently I am working around this by:
Let x = 1 - exp(-t/T) yielding I = 1 + Ax. Then use the linear
regression box with the formula y = c0 + c1x to get the coefficients.
This doesn't give the correct result because the c0 coefficient does
not equal 1 exactly.