From: Philipp K. J. <ja...@ie...> - 2009-11-08 20:18:03
|
Here is a recurrent problem I often have: Frequently, I would like to plot some data after subtracting off the mean. Or I would like to normalize the variation by dividing with the standard deviation. Or I'd like to form a normalized histogram, by passing the number of records in the data set to "smooth frequency". Currently, I always have to invoke an external program to find these quantities, which is always a little inconvenient in interactive use, and pretty painful when scripting gnuplot. When not on Unix, it may be quite difficult! For the last few weeks, Zoltán and I have been working on a command that calculates the most important such quantities from a data file, displays them, and (optionally) assigns them to variables in the current gnuplot session. You can see some examples of what you can do with this command here: http://www.phyast.pitt.edu/~zov1/gnuplot/patch/stats.html and you can read the full documentation here: http://www.phyast.pitt.edu/~zov1/gnuplot/patch/stats_help.html I uploaded a patch with our changes to sourceforge. We'd like to hear feedback and suggestions. Is this useful? Are we missing anything? We'd also like to encourage everyone to build the patch and play with it - each additional user finds a new class of bugs! Best, Ph. |