RE: Re: Powder Diffraction In Q-Space

2007-02-21 Thread Jacco van de Streek
--- "Von Dreele, Robert B." <[EMAIL PROTECTED]> wrote: > Actually, I looked at Luca's little "show" & was > sufficiently interested > that GSAS will now plot sqrt(I) style plots. There > is one "problem" - > the value of "I" can be negative particularly after > a background > subtraction. These mus

RE: Re: Powder Diffraction In Q-Space

2007-02-21 Thread Von Dreele, Robert B.
Actually, I looked at Luca's little "show" & was sufficiently interested that GSAS will now plot sqrt(I) style plots. There is one "problem" - the value of "I" can be negative particularly after a background subtraction. These must be suppressed to zero for this plot to work - thus there is a small

RE: RE: Powder Diffraction In Q-Space

2007-02-21 Thread Von Dreele, Robert B.
OK, I did play about & display some Q-space (Q=2pi/d) plots in GSAS. It will be an option in the next release. Pretty similar to conventional 2-theta plots - just a slight "squishing" of the scale at the upper end. Might not be really desirable for complex patterns. Some TOF data where data was col