Fitting a single polynomial to a bunch of data is pretty easy in Pytorch using an nn.Linear layer. I've included a trivial example at the end of this post. But suppose I have tons of data split into g...

I have a couple of functions that are defined in an external library. I cannot change the arguments or contents of these functions. Take as an example the following functions (although the originals a...

I would like to fit a periodic rectangle function to my data. I have tried this with the least squares method using curve_fit from scipy.optimize. Unfortunately, the optimization does not converge. He...