Finding consecutive maxima and recording them Post: 302603197

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Top Forums Shell Programming and Scripting Finding consecutive maxima and recording them Post 302603197 by pau on Wednesday 29th of February 2012 09:50:58 AM

02-29-2012

Registered User

thanks. The data are in ascii format. So once you edit it with vi you will realize that there is not danger in dowloading it.

I was posting the link because there are many maxima spread all over the file.

A screenshot of the figure is here:

http://www10.pic-upload.de/29.02.12/t2a923mue74l.png

X = time

Y = distance between two objects; let's say between two stars

The orbit is decaying as you can see, and a maximum corresponds to an apocenter (the two stars are at their maximum separation at that moment), and a minimum to a pericenter (minimum separation at that moment).

This corresponds to the first 600 lines, which contain the first two maxima. It is obvious to find these with sort or awk and then calculate the X separation between them.

But I want to do that for the whole range of Y, as well as the instantaneous period.

I.e. I want to have

"Separation in X between two consecutive maxima" vs. "X" for the whole file.

---------- Post updated at 03:50 PM ---------- Previous update was at 03:48 PM ----------

sorry, the first 600 lines are here

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LEARN ABOUT DEBIAN

wxmaxima

WXMAXIMA(1)						      General Commands Manual						       WXMAXIMA(1)

NAME

       wxmaxima -- wxWidgets interface for maxima

SYNOPSIS

       wxmaxima

DESCRIPTION

       This manual page documents briefly the wxmaxima command.

       It  was written for the Debian distribution because the original program does not have a manual page. Instead, it has documentation in it's
       Help	  menu.

       wxmaxima is a rather self-explanatory front-end to the maxima computer algebra system. It provides a graphical interface  and  2D  formated
       output  display for maxima. Its menu system facilitates the access to a huge part of the maxima native set of commands and also to a brows-
       able maxima help. The dialogue windows make easy the introduction of mathematical entities such as limits, matrices, etc.

       maxima is a free (GPL) common lisp implementation based of the original computer algebra system Macsyma developed at MIT. It has full docu-
       mentation (HTML and info) included in the maxima-doc Debian package.

       It uses the cross-platform GUI toolkit wxWidgets and runs natively on different operative systems.

OPTIONS

       This program takes no options

SEE ALSO

       maxima (1), xmaxima (1).

AUTHOR

       This manual page was written by J. Rafael Rodriguez Galvan rafael.rodriguez@uca.es for the Debian system (but may be used by others).  Per-
       mission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public  License,  Version	2  or  any
       later version published by the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.

																       WXMAXIMA(1)