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test_params.md

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Running TITAN with permutated parameters

To determine the best thresholding parameters to use, it may be useful to run TITAN over a range of permutations of parameter values.

Generate parameter files

The TITAN parameter base file (test_param_base.txt) sets common parameters to use in all test cases.

Edit the R script generate_titan_param_files.R to choose the range of values over which to permute. The default values are:

low_thresh = seq(34, 42, by=1)         ## Values for low_dbz_threshold.
dual_by = 1                            ## Increment for dbz_threshold in dual_threshold.
dual_min = 4                           ## Try from low_dbz_threshold + dual_min, for dbz_threshold.
dual_max = 12                          ## Try up to low_dbz_threshold + dual_max, for dbz_threshold.
min_size = c(25, 50, 75)               ## Values for min_storm_size (km3).

Run the R script to generate TITAN parameter files for each threshold permutation.

Rscript $HOME/git/stormtrack/code/R/generate_titan_param_files.R

Run TITAN

Edit and run the script test_titan_params.sh to run TITAN using each parameter. The date range over which to run is specified in this script. Run the script in the directory in which you want output.

cd param_test
$HOME/git/stormtrack/code/sh/test_titan_params.sh

Extract storm properties

Edit and run the script extract_test_param_results.sh to run stormStats on each output storm file.

$HOME/git/stormtrack/code/sh/extract_test_param_results.sh