Overriding and setting default values for homer processes
Where are the defaults specified
the homer distribution files are contained in
on a windows distribution /your_libisis_directory/matlab
on a linux rpm installation: /usr/local/libisis/applications/matlab/ in the svn repository: /libisis/applications/matlab/
each instrument has a directory where there are instrument specific scripts used to define default values and files which are used to set up and populate the IXTrunfile object.
overriding instrument specific population
in the case where there is incorrect information in the rawfile which has been generated we can populate detector and spectra information from a nexus file. Overriding_and_setting_default_values_for_homer_processes#Creating populated nexus files
the specific MERLIN population information is contained in the file
setup_merlin_data_source.m
this defines the nexus files which are required for population of the IXTrunfile object which in turn the .spe file is produced from. i added the following two lines to this file, with these lines present the libisis system will try and load the IXTdetector and IXTspectra object from these files.
DSO=add_item(DSO,'inst_nxs:::merlin_detector.nxs','detector'); DSO=add_item(DSO,'inst_nxs:::merlin_spectra.nxs','spectra');
these files are not distributed with libisis package as they can change. the 'inst_nxs:::' path is a standard definition which is specified in the inst_defs.m file