I need a software which can be run in command mode. As right now, I am using TableCurve2D for fitting the data. But there is one problem with this software, i.e., it is windows based and commercial software. I would be highly appreciated if anyone of you could suggest me a free software which I can use.
I will recommend you to use curve expert. You can take reference from the following link:
It is available for free download and very easy to use. Beneficial tool!