sin and cos Regression

If I have an x and y data set and I want to make a sin and cos regression out of them how would I do that. I just want Matlab to plot it out, give me a best fit line, and an equation for the functions. Also I would like an R^2 for the best fit line. How would I do this? note:(I only have the college student version.)

Answer 1

[Image Analyst]

Can't you just take the FFT and look for the dominant frequency? I'm not sure what a line means when you are trying to fit a sine wave to some data. Don't you want to find the best sine wave that goes through the data?

[nicholas m.]

We took the data in logger pro so we saw the graph and I know is is a sin function. I have all the data points for one period of the function. Now I just want matlab to draw a regression line through the data points. I believe my professor referred to it exactly as a (sin regression). Can mat lab do this for me and if so how?

[Image Analyst]

If you want something with more precision, then perhaps he is referring to SSA. See the wikipedia page at http://en.wikipedia.org/wiki/Singular_spectrum_analysis.

Answer 2

[abraj ali]

In a single Matlab script, plot a sine wave and cosine wave over one period (0 to 2π). Checkpoints of the requirements: a. Generate your independent variable first; the step size should be no larger than 0.1 so that it has enough samples to get smooth lines. Plot the two waves on the same graph.

[Image Analyst]

I think you meant to start a new question with a "tag" of "homework" because this is not an Answer to nicholas's 5 year old question up at the top.