Re: [phenixbb] Implementation of French & Wilson data correction?

The old truncate allows you to do a simple square root, and it sets the negative Is to zero. This option is available when running truncate separately from scala (i.e. in the scala interface switch truncate running off). The default is to apply the French & Wilson correction. The new truncate (ctruncate) seems to have lost that option, and it always 'truncates'. So the old version would allow you to compare the approaches easily, the new one would not. Johan Dr. Johan P. Turkenburg                     X-ray facilities manager York Structural Biology Laboratory University of York                               Phone (+) 44 1904 328251 York YO10 5DD   UK                          Fax   (+) 44 1904 328266 On 25 February 2011 18:58, Jeff Headd wrote:

Hi Joe,

On Fri, Feb 25, 2011 at 10:38 AM, Joseph Noel wrote:

...

I'll give it a go! I know Otwinowski well and we have had many discussions about negative intensities. Do you know if Scala/Truncate resets negative intensities to 0?

Both truncate and ctruncate include an implementation of the F&W method, so negative intensities will be scaled to have a positive value.

Thanks, Jeff _______________________________________________ phenixbb mailing list [email protected] http://phenix-online.org/mailman/listinfo/phenixbb