Set an exponential curve through data points in Matlab

Question

Having exponential decay data, I would like to fit a curve through it. How can I do this in matlab?

Answer 1

Try the following:

ft=fittype('exp1'); cf=fit(time,data,ft) 

This is when time and data are your data vectors; time is an independent variable, and data is a dependent variable.

This will give you the coefficients of the exponential decay curve.

Answer 2

If by position you mean the least squares, you should try lsqcurvefit

Answer 3

cftool (X, Y) is the path. here is some binding:

LINK1 LINK2

Answer 4

Matlab has a polyfit function. It can correspond to a curve for data that can be represented as a * X ^ n + b * X ^ (n-1) + ..... z. However, if you are sure that the data has some exponential decay, you can try logarithm the data first and then use the polyfit function. I am working.

Answer 5

Linearize, Least Squares, delinearise :-)