Introduction
Software
Experiment
Data processing
Post-processing and results evaluation
Advanced discussions
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Below is an example of a GrainSpotter loop for olivine. You can run it by typing
gsLoop.sh > gsLoop.log
The output of the loop will be saved in gsLoop.log.
The loop can run nLoops indexings (typically 3). For each, the loop runs
At the end of the loop, all results for the corresponding loop number are saved in a folder called Indexing-$loop, where $loop is the loop number. Merged grains are in a file called merge-grains.log and their Euler angles in merge-grains-euler.txt.
A good start is to look for the number of assigned G-vectors. This command will do it
cat gsLoop.log | grep "Assigned gvectors"
It will print out something like
ssigned gvectors: 3915 Assigned gvectors: 3719 Assigned gvectors: 3719 Assigned gvectors: 3719 Assigned gvectors: 3719 Assigned gvectors: 3719 Assigned gvectors: 3719 Assigned gvectors: 3139 Assigned gvectors: 2997 Assigned gvectors: 2972 Assigned gvectors: 2950 Assigned gvectors: 2927 Assigned gvectors: 2873 Assigned gvectors: 2873 Assigned gvectors: 2873 Assigned gvectors: 2873 Assigned gvectors: 2873 Assigned gvectors: 1831 Assigned gvectors: 1831 Assigned gvectors: 1831 Assigned gvectors: 1817 Assigned gvectors: 2121 Assigned gvectors: 1454 Assigned gvectors: 1454 Assigned gvectors: 1454 Assigned gvectors: 1454 Assigned gvectors: 3915
3915 is the number of experimental G-vectors that could match our crystal structure. It decreases it time we generate a new GVE file based on a previous GrainSpotter indexing. When it increases back to 3915, it means that the loop fully started over. In the example above, we started from 3915 experimental G-Vectors, 1454 are left, we assigned approximately 60% of the experiment G-Vectors.
The ratio of assigned G-Vectors is not 100% trivial to calculate as the number of matching experimental G-vectors depends on your Δ2θ and nσ parameters in the GrainSpotter input file.
