MET Online Tutorial

MET Online Tutorial for METv3.0

Stat-Analysis Tool: General

Stat-Analysis Functionality

The Stat-Analysis tool ties together results from the MET statistics tools by providing a way to filter their STAT output files and aggregate the results through time and/or space. The Stat-Analysis tool processes the STAT output of the Point-Stat, Grid-Stat, Wavelet-Stat, and Ensemble-Stat tools and performs one or more analysis jobs on the data. The Stat-Analysis tool may be run by specifying a single analysis job on the command line or multiple analysis jobs using a configuration file. The analysis job types are summarized below:

  • The filter job simply filters out STAT lines from STAT files that meet the filtering options specified.
  • The summary job operates on one column of data from a single STAT line type. It produces summary information for that column of data: mean, standard deviation, min, max, and the 10th, 25th, 50th, 75th, and 90th percentiles. For example, it can be used to look at the summary of a statistic like RMSE across many cases in time.
  • The aggregate job operates on a single line type and aggregates the STAT data in the lines which meet the filtering criteria. It dumps out a line containing the aggregated data. For example, it can be used to sum contingency table counts (CTC) across many cases and dump out the aggregated counts (CTC). The input line type is the same as the output line type.
  • The aggregate_stat job performs almost the same function as the aggregate job, but the output line type differs from the input line type. For example, it can be used to aggregate contingency table counts (CTC) across many cases and dump out statistics generated from the aggregated contingency table (CTS).
  • The go_index job computes the GO Index, a performance metric used primarily by the United States Air Force.

The Stat-Analysis Tool really performs two main steps:

  1. Filter the input STAT lines using the filtering parameters set in the configuration file and/or on the job command line.
  2. Perform one or more analysis jobs on those STAT lines that meet the filtering criteria.

Stat-Analysis Usage

View the usage statemet for Stat-Analysis by simply typing the following:

    bin/stat_analysis

At a minimum, you must specify at least one directory or file in which to find STAT data (using the -lookin path command line option) and either a configuration file (using the -config config_file command line option) or a job command on the command line.