.. rst3: filename: NewPluginsAndBig Fixes

New Plugins and Bug Fixes
============================

.. post:: 5 Nov, 2025
    :tags: data-formats, data analysis, bugfixes
    :author: T. B. Passin

Version 1.6.3 has been merged from the `devel` branch into the `main1` branch.  It has some bug fixes and improvements to the new date handling code.  There are also new plugins.  The most notable are:

1. ```extend.py``` (button `Extend/Trim`)
    Adds extensions of N points to each end of the data. N is added using a standard dialog.  It's supposed to be an integer but if not it will be converted to one if possible. The ```y``` value of the extension is the average of the first or last 5 data values.

    If N is negative, N points will be trimmed away from each end.

    This plugin is useful for math operations that would overrun the ends of the data, such as convolution. It prevents the non-existent data from being taken to be zero, which can be helpful for certain calculation.

2. ```ljung_box.py``` (button `Ljung-Box`)
    Runs a ljung-box test of randomness on the data in the ``X`` stack position. See `Wikipedia: Ljung–Box test <https://en.wikipedia.org/wiki/Ljung%E2%80%93Box_test>`_.

3. ```sign_runs.py``` (button `Sign Runs`)
    A test for randomness that inspects the number of runs of points that have the same sign. Like all such tests that operate on a single data set, it uses the data in the ``X`` stack position. The data needs to have a mean of zero or close to it. The test uses the Wald–Wolfowitz runs test.  See `Wikipedia: Wald–Wolfowitz runs test <https://en.wikipedia.org/wiki/Wald%E2%80%93Wolfowitz_runs_test>`_.