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datastat - Simple command-line data statistics Copyright 2011-2019 by Tommaso Cucinotta firstname dot lastname at gmail dot com ====================================================================== datastat is an open-source command-line tool that allows one to compute simple statistics over columns of numeric data in text files by aggregating rows on the basis of the values of specified key columns. The simplest usage of the tool is to compute the average of all columns in a file with many rows. For example: datastat myfile.dat will produce on the standard output a single row, containing as many columns as in the input file, and with each value being the average of all the values in the corresponding column. If one wanted also the standard deviation, then datastat --dev myfile.dat would provide an output file where, for each input file column, there are two output values, one with the average and the following one with the standard deviation of all the values in that column. A more complex usage is when you need to aggregate data in the input file based on some key columns. For example, the input file contains 3 columns with the first two columns being configuration options for some experiment, and the third column being the actual output of the experimentation. The file may have many such rows, with repeated entries per configuration. The user would like to compute the average values aggregated depending on the first configuration parameter: datastat -k 1-2 myfile.dat This will produce an output with multiple rows, one for each value pairs within the first two columns of the input file, and for each row one can find the average of each configuration on the third column. Other statistics that can be easily computed over all the values within a column, or all the values within each key value set, include the standard deviation, the minimum, the maximum and the elements count. datastat has been purposedly kept at a minimum of functionality. Its power resides in pipe-ing it with other common UNIX tools for column-based numeric table processing, including grep, sed, cut, paste, awk and sort. Ultimately, it may be extremely useful to use datastat in combination with said tools in a GNUplot plotting script. License of use ====================================================================== datastat is provided under the GPLv3 license. See LICENSE.txt for details.