Plot of Temperatures in Anchorage (Curve Fit - Linear)
- Latest result: Plot created
- Created on: 23 Nov 2011
This is an example of how to do a linear fit. Note that it uses the three-argument output form of polyfit to avoid numerical problems with the time vector.
t = time1155; d = data1155(:); % Only use that last 30 day's worth of data keep = t>(now-30); t = t(keep); d = d(keep); [p,S,mu] = polyfit(t,d,1); % p1 is the equation for the linear fit to the data p1 = [p(1)/mu(2) p(2)-p(1)*mu(1)/mu(2)]; tf = [t(1) t(end)]; df = polyval(p1,tf); plot(t,d,'o:') hold on plot(tf,df) datetick
Created 19 Oct 2011 by Ned Gulley (2 Likes)
Updated 19 Jun 2013
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