stupid question on natural logs

[LordSnailz]

Never thought I would need this at work but I do 🙂

I'm trying to a regression on the following equation y = a*exp(b*x)+1 but it doesn't seem like I'm able to simplify to a linear equation.

If there wasn't the +1 term, it would give ln(y) = ln(a)+b*x, but with the +1 term, I'm getting ln(y) = ln(a*exp(b*x)+1) ... is there way a to break up the right side?

 

[magomago]

why not do a taylor series expansion on it? Keep as many coefficients as you want depending on how accurate you actually care for

 

[jemcam]

I usually just flush them without worrying about breaking them up.

 

[speg]

ln(y-1) = ln(a)+b*x ?

 

[BoomerD]

log splitter works well for me...

 

[simpletron]

ln(y-1)=ln(a)+b*x, maybe you can use this and just shift the y by one at the end

 

[JulesMaximus]

I use a big sledge hammer and a wood splitter.