Back to basics. Caglioti Function is instrument function and is often times used inappropriately. Just my two cents worth (and these days, 2-cents ain't worth much.......) Frank May St. Louis, Missouri U.S.A.
________________________________ From: Jon Wright [mailto:wri...@esrf.fr] Sent: Thu 3/19/2009 8:58 AM Cc: Rietveld Method Subject: Re: UVW - how to avoid negative widths? > According to Caglioti relation, the dimensions of U,V,W are as (angle)^2. Quick question - does anyone have a trick to stop the Cagliotti formula going negative? Prodd currently has a habit of bugging out on a sqrt(negative) and I'm wondering how other folks worked around that, or if I've got something completely wrong...? Thanks, Jon
