prefield(1) [debian man page]
PREFIELD(1) User Commands PREFIELD(1) NAME
prefield - prepare input file for 'muplot' to plot 2-d fields by arrows SYNOPSIS
prefield <file> <scale> x y F_x F_y DESCRIPTION
prefield will prepare input file for 'muplot' to plot 2-d fields by arrows Example: On running "prefield test.dat 20 1 2 5 6" the source file 'test.dat' will be read, and a field-data file will be produced with the 1st and 2nd columns being the x and y space-positions like in the source file, whereas the fields F_x and F_y are calculated from the values in the 5th and 6th columns of the source data multiplied by the second command line option, which means in this example a 20-fold magnification. Use '-' as file name to read from <stdin> and write to <stdout>. COPYRIGHT
Copyright (C) 1997, 2001, 2005, 2007, 2009, 2011-2012 Dimitar Ivanov License: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. prefield 1.4.8 February 2012 PREFIELD(1)
Check Out this Related Man Page
STDA(1) User Commands STDA(1) NAME
stda - Simple Tools for Data Analysis (STDA) DESCRIPTION
STDA includes some primary tools for data analysis. You can evaluate sums, averages, integrals, derivatives, histograms or probability dis- tribution functions of 1-d data, and eventually plot the results. The programs are stand-alone tools (supporting the standard UNIX input and output pipelines) intended for data processing from the command line. It should be noted that all but one of the scripts use awk and core system utilities. For plotting you have to install Gnuplot (see http://gnuplot.info) since 'muplot' is a wrapper around it. In sum- mary, the package provides utilities for straightforward analysis of data series where a complex analytical approach is not needed and where an ultimate numerical precision with floating-point numbers is not critical. Some general examples of application cases include eval- uating usage statistics from server logfiles, determining a response time distribution from a series of queries to a [remote] service, pro- ducing a plot from multiple data files, etc. This software should be considered as an open project to be extended with new command-line driven utilities helpful for performing common data analysis tasks. Any contributions and suggestions are welcome. Following programs are included in the distribution: * maphimbu - histogram builder for 1-d numerical and text data * mintegrate - average/sum/integral/derivative of 1-d numerical data * mmval - find minimum and maximum value in a data set * muplot - plot a multi-curve figure from multiple data by using Gnuplot * nnum - produce a series of equally separated integers or floats * prefield - prepare input file for 'muplot' to plot 2-d fields by arrows EXAMPLES
- Evaluate the current apache2 logfile and make an unique list of the hostnames (respectively ip-addresses) sorted by the total number of their http requests: maphimbu -rs2 /var/log/apache2/access.log - On a X terminal plot the probability function and the cumulative distribution function of a sin(x) data sample: nnum -3.14159 3.14159 0.00001 %.6g |awk '{ print $1, sin($1) }' | maphimbu -d0.01 -x2 -ns1 |mintegrate -d0.01 -x1 -y3 -S |muplot lp - 1:3,4 COPYRIGHT
Copyright (C) 2009, 2011-2012 Dimitar Ivanov <dimitar.ivanov@mirendom.net> License: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. stda 1.1.1 February 2012 STDA(1)