ExponentialFit-not-Converging
Last Update: 2/4/2015
For an exponential function exp(x), Origin will return missing value when the independent variable x is greater than 665.
In order to get the fit converge, you need to redefine the equations to avoid the x variable value of the exp(x) function from greater than 665.
For example:
1) You can take natural logarithm for both sides of equation.
2) If your function has expression in the form of exp(x1)*exp(-x2), you can transform it as exp(x1-x2)
Keywords:curve fitting, fitting error, exponential function