Curve fitting with no input give

Hi:

If no input is given how can curve fitting be done?

Urmila

Answer 1

[Matt Tearle]

Do you mean that you have data but no idea about the curve to fit? If so, there are nonparametric methods available, such as LOESS. This free webinar might be of interest.

Answer 2

[Matt Fig]

Do you mean you want to fit a curve to no data? That sounds easy, for I would think that just any curve can fit no data with equal accuracy. Let's try to fit a line to no data and see what happens:

P = polyfit([],[],1)
P =
     0     0

So, the curve of best fit is

   y(x) = 0x + 0

which sounds as reasonable to me as any other fit I can imagine.

[Urmila]

I have figured it out. Basically the matrix is generated from a system that produces it without any input data. That is the user does not give input data to the system so that the system produces a matrix.