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Curvefitting
Posted:
Sep 30, 1996 3:38 PM


Hi, as a new user of Matlab, I have been faced with the following problem. I am doing error propagation, and lets say that I have the following situation:
1) I make a scatterplot of 20 points on a nonlog, xy plot. 2) I use c2=curvefit(x,y,1) to fit the least squares line 3) I have to use the slope of this line in further calculations, and would like to know how to take the error of the slope into account. I know that it is not simply corrcoef(x,y) but that I need something like: The slope = 2345.6 +/ 43.3
How can I get a +/ like shown above? I looked through Traver's Tutorial, as well as the one by Sigmon, and the MIT help docs, and couldn't figure out how to do this. If someone could help, I would greatly appreciate it.
Koichi Kunitake <kkunitak@mit.edu>



