Difference between revisions of "Overriding and setting default values for homer processes"
| Line 1: | Line 1: | ||
| − | |||
== Where are the defaults specified == | == Where are the defaults specified == | ||
| Line 12: | Line 11: | ||
<tt>/libisis/applications/matlab/</tt> | <tt>/libisis/applications/matlab/</tt> | ||
| − | 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. | + | each instrument has a named 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|Creating populated nexus files]] | |
| − | the specific MERLIN population information is contained in the file | + | For example the specific MERLIN population information is contained in the file |
| − | setup_merlin_data_source.m | + | <tt>setup_merlin_data_source.m</tt> |
| − | + | This file defines the nexus files which are required for population of the [[IXTrunfile]] object which in turn the .spe file is produced from. | |
| + | To define files used to populate the [[IXTdetector]] and [[IXTspectra]] objects from the we can add the following two lines to this file: | ||
| + | <pre> | ||
DSO=add_item(DSO,'inst_nxs:::merlin_detector.nxs','detector'); | DSO=add_item(DSO,'inst_nxs:::merlin_detector.nxs','detector'); | ||
DSO=add_item(DSO,'inst_nxs:::merlin_spectra.nxs','spectra'); | DSO=add_item(DSO,'inst_nxs:::merlin_spectra.nxs','spectra'); | ||
| + | </pre> | ||
| − | + | 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 <tt>inst_defs.m</tt> file or | |
== Creating populated nexus files == | == Creating populated nexus files == | ||
| + | populate an IXTrunfile from a rawfile containing the correct values and enough detectors to include all those used by the mapping you have chosen - ie if you have an [[IXTrunfile]] which has been populated by the 'mon' command then it will not contain enough detector information. | ||
| + | then you make the matlab command | ||
| + | <pre> | ||
| + | >> write_nxs(your_runfile.inst.detector,'mydetectorfile.nxs') | ||
| + | >> write_nxs(your_runfile.inst.spectra,'myspectrafile.nxs') | ||
| + | </pre> | ||
| + | these files can then be used in the lines above to populate the [[IXTrunfile]] object provided thety are placed in the inst_nxs::: path | ||
Revision as of 10:09, 4 July 2008
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 named 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. Creating populated nexus files
For example the specific MERLIN population information is contained in the file
setup_merlin_data_source.m
This file defines the nexus files which are required for population of the IXTrunfile object which in turn the .spe file is produced from.
To define files used to populate the IXTdetector and IXTspectra objects from the we can add the following two lines to this file:
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 or
Creating populated nexus files
populate an IXTrunfile from a rawfile containing the correct values and enough detectors to include all those used by the mapping you have chosen - ie if you have an IXTrunfile which has been populated by the 'mon' command then it will not contain enough detector information. then you make the matlab command
>> write_nxs(your_runfile.inst.detector,'mydetectorfile.nxs') >> write_nxs(your_runfile.inst.spectra,'myspectrafile.nxs')
these files can then be used in the lines above to populate the IXTrunfile object provided thety are placed in the inst_nxs::: path