Hello..
I am dealing with a cosmological parameter estimation problem. I have a sum of squares function (chisquared) of two parameters and I have minimized it using fminsearch, to find the best fit. Now, I want to plot 1sigma, 2sigma confidence contours for this. My parameter probability distribution may not be Gaussian. So , I don't want to do it in the usual way of adding 2.3 to chisquared minimum and drawing the contour for 1sigma. How can I draw a contour that encloses 68% of the area of the surface?
thanx
