Hi All,

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.

Thanks,

/Sue