HI Jaroslav and thank you for your email.  Regarding yo ur question, yes SasView reports everything in terms of number distribution (or at least it is supposed to -- let us know if there is an error).  O f course scattering weights things differently but that is handled by SasView for you because most of us think more easil y in terms of the number distribution.

As for the log normal distribution it is supposed to be returning the x_med not the x_peak as I understand it.

Hope this helps

Paul

On Tue, Apr 17, 2018 at 9:39 AM, Jaroslav Kousal < span dir="ltr"> <jarda@kmf. troja.mff.cuni.cz> wrote:
Dear Sir/Madam,
I using now SASView package to analyse SAXS data, thank you for this valuea ble piece of software.

However, I am not fully sure, which parameter of the lognormal distribution ( http://www.sasview.org/docs/user/sasgui/perspectives/fitting/pd_h elp.html ) is used in the sphere model ( http://www.sasview.org/docs/user/models/sphere.html ) as "rad ius".

Is it the x_mean, x_med or x_peak?

The FAQ seems to suggests that "radius" is the "x_mean" and that the distribution itself is a number distribution.
Is this correct?

Best regards
   Jaroslav Kousal

--
-----------------------------
Mgr. Jaroslav Kousal, Ph.D.
Charles University
Faculty of Mathematics and Physics
Department of Macromolecular Physics
e-mail: jarosl av.kousal@mff.cuni.cz
tel: +420 95155 2256

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