Difficult datasets: Difference between revisions

Difficult datasets (view source)

9 bytes removed , 8 April 2015

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 == optimizing the parameters for COLSPOT ==
-play with the following [http://xds.mpimf-heidelberg.mpg.de/html_doc/xds_parameters.html parameters], and use GNUPLOT (see below) to find their influence:
+IDXREF depends on the reflection positions stored in SPOT.XDS . This file is written by COLSPOT, and its contents can be visualized e.g. with GNUPLOT:
+ plot "SPOT.XDS" using 1:2
+Obviously, only if the true reflection pattern is represented well by SPOT.XDS can IDXREF be successful. So, play with the following [http://xds.mpimf-heidelberg.mpg.de/html_doc/xds_parameters.html parameters], and use GNUPLOT to find their influence:
   STRONG_PIXEL=
   MINIMUM_NUMBER_OF_PIXELS_IN_A_SPOT=
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 Don't refine the DISTANCE in REFINE(IDXREF) !
-IDXREF depends on the reflection positions stored in SPOT.XDS . This file is written by COLSPOT, and its contents can be visualized e.g. with GNUPLOT:
- plot "SPOT.XDS" using 1:2
-Obviously, only if the true reflection pattern is represented well by SPOT.XDS can IDXREF be successful.
 For close reflections, you may want to reduce SEPMIN below its default of 6, and set CLUSTER_RADIUS to half of the new value.