luafox 1.50 update for NutPi users

[Michael Gerbracht]

All users who purcharsed the NutPi software collection for the Raspberry Pi
may update to luafox 1.50. The NutPi package always contains the current
version of luafox so if you bought NutPi after a new version of luafox was
released you can freely upgrade to this version. Since NutPi was relaesed on
the same day as luafox 1.50, all user can request the update by sending an
e-mail to ris...@luafox.com containig the NutPi serial number (there is a
small tool on the SD card to read and save the serial number).

All users who bought luafox 1.30 or later separately should have got a free
update a few month ago.

The current version 1.50 of luafox adds the following new features:

Undo & Redo:
------------

All function and operations of luafox now support undo, so that you can take
back all unwanted actions. luafox supports multi step undo so that you can go
back through a number of applied operations until you reach the point where
you can continue working on the data. The number of undo steps is user
defined. There is also a redo function which allows you to go forward again.

Search & Replace:
-----------------

luafox also allows you to search for an expression now. This can be a number
or a string for example and luafox also allows you to use the powerfull
search expressions supported by the lua language. So you can search all
numbers with two digits or all that end with the number "5". Of course you
can also replace the expression in a very flexible way. luafox allows you to
use the found expression to be used in the replacement expression. So if you
have data columns which contains physical units like "30.5m" or "67.4kg"
which can not be directly handled by luafox you can strip the unit and just
leave the number 30.5 and 67.4 in order to do some calculations. You can also
include the column and row number in the replacement string as well as the
current counter if you replace more than one cell.

Count multiples:
----------------

A new function has also been added to this release. It allows you to cound
multiple appearences of a number. If you have a column with random numbers
between 1 and 100 you can use this function to quickly see which numbers the
column contains and whether some numbers appear twice or more times. This
function could also be usefull if you have a list of words and want to count
the multiples for example to optimise your spam filter.

Keep entry field open:
----------------------

If you enter a number into a cell the toolbox is extended to show the input
filed where you can edit the cell entry. If you finish the toolbox reverts to
its original size again. Some users found this irritating so that luafox now
contains a small button to keep the entry field open all the time and fade
the icons if no cell has been selected.

About luafox:
-------------
luafox is a program for scientific data analysis. It reads data from files in
the ods (OpenOffice / LibreOffice) and the new Microsoft Excel (.xlsx)
format, as well as csv data files. You can use the program to change the data
(flip rows, sort, rearrange), apply functions to it and finally plot the data
as line, scatter graph or bar chart and export it in the draw format.

Visit the website for more information:
http://www.luafox.com/



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