On Sat, 24 Nov 2007, Angus McMorland wrote: > fwhm is the full-width at half the maximum height, i.e. it's the > difference between the two values of x when: > > |r - c| = 0.5
Angus, The additional explanation helps a lot. > The fwhm is a shape parameter (like std dev) - it determines the width of > the curve. The combination of width and the range of values you plot (r) > determine how close the function gets to zero, and how much of it is > plotted. As Jeff said, it'll never actually reach zero, so you have to > decide how close is close enough. > > You don't need to call fwhm2k yourself; it's called by the gauss1d > function. I just do it that way because the equation uses k, but I'm > always interested in fwhm. Ah, I missed seeing that. > Perhaps the easiest thing is to shove it into some quick code and play > around with the values so you see how it works: That's what I intend to do. I've been running ipython and also writing small scripts to understand how the functions work ... and plot. Playing with parameters clarifies everything. Much appreciated, Rich -- Richard B. Shepard, Ph.D. | Integrity Credibility Applied Ecosystem Services, Inc. | Innovation <http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863 ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
