ctruncate outputs the table with Mn(F/sd) (which will be twice Mn(I/sd))
when it does anisotropy analysis
On Mon, 2010-11-01 at 15:18 -0500, Radisky, Evette S., Ph.D. wrote:
>
> Dear all,
>
> I have previously used SCALA for data reduction, and in publications
> and pdb depositions, reported the "Mn(I/sd)" output from SCALA for the
> whole data set and for the highest resolution shell.
>
> We now have some data that has instead been reduced using the HKL
> suite, and I am confused about how to find the value that would be
> equivalent to Mn(I/sd) from SCALA. For I/Sigma(I) I've been advised
> by a colleague more familiar with HKL to manually calculate from
> average I divided by average error (sigma). As pointed out in a
> previous ccp4bb thread, this would give me <I>/<Sigma(I)>, which is
> not the same as <I/Sigma(I)>.
>
> Two questions:
>
> (1) Is this <I>/<Sigma(I)> what is generally reported in the
> literature for data processed with the HKL suite?
>
> (2) Since I would also like to know the Mn(I/sd) by shell anyway so
> that I can compare to previous data sets, is there a way to extract
> this value from the scalepack log, or is there a simple reflection
> file analysis utility that could read the .sca or .mtz file to extract
> this information?
>
> Thanks for any clarifications or suggestions!
> Evette
>
> Evette S. Radisky, Ph.D.
> Assistant Professor
> Mayo Clinic Cancer Center
> Griffin Cancer Research Building, Rm 310
> 4500 San Pablo Road
> Jacksonville, FL 32224
> (904) 953-6372
>
--
"I'd jump in myself, if I weren't so good at whistling."
Julian, King of Lemurs
