 |
 |
There's a subtle bug in the code that produces the "summary views" in the SPM file selection window, which can mean that the order of scans within a summarised group may not be the same as in a "normal" uncompressed view. When image filenames do not have leading zeros, in a normal view, SPM is clever, and will put "image2.img" before "image10.img", even though alphabetically they should be the other way round. However, in a summary view, selecting the group of files indicated by entry "image*.img" returns the list of matching files in alphabetical order, with "image10.img" appearing before "image2.img". Further, when using a file filter string of "*", under certain circumstances the files within a group may be in a really bizarre order. This is only really an issue for sites which do not use leading zeros in filenames, and select files by group from a summary view. With filenames such as "image002.img" & "image010.img" the smart order and alphabetical order of the summary view are the same. An updated version of spm_get.m for SPM96/7 is available from the SPMweb site at: ftp://ftp.fil.ion.ucl.ac.uk/spm/spm96_updates/spm_get.m Further technical details on the problem, workarounds, and the fix can be found in the "Bugs&Fixes" section of the SPM96 web page: http://www.fil.ion.ucl.ac.uk/spm/spm96.html#Bugs96 -andrew +- Dr Andrew Holmes [log in to unmask] | ___ __ __ Wellcome Department of Cognitive Neurology | | ( _)( )( ) Functional Imaging Laboratory, Stats & | | ) _) )( )(__ 12 Queen Square, Systems | | (_) (__)(____) London. WC1N 3BG. England, UK | +------------------------------------- http://www.fil.ion.ucl.ac.uk/ -+ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%