Talk:Approximate entropy

Interpretation
Removed parenthetical notation implying that "less predictable" and "more complex" are equivalent with respect to data sets describing measurements of processes. This is a highly contentious point within dynamical systems theory, and the comparison isn't doing any important work in the article, so it is better to simply not mention the issue. - RealityApologist (talk) 04:12, 11 January 2013 (UTC)

Algorithm
The algorithm from this article is different than the one cited (http://physionet.org/physiotools/ApEn/) but also different than one of Pincus' article (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC51218/?page=3). I suspect the physionet one is the correct version.

The is also an inconsistency between the formula used for ApEn in the algorithm and the example. — Preceding unsigned comment added by 79.112.123.231 (talk) 20:17, 23 October 2013 (UTC)

Regarding the Python implementation
My opinion is that when NumPy has already been imported we should make better use of it. I suggest this

TorTheNorwegian (talk) 19:40, 28 October 2020 (UTC)

And here is a more compact version:

TorTheNorwegian (talk) 02:08, 13 November 2020 (UTC)

Here is a version where sums of booleans are avoided:

TorTheNorwegian (talk) 05:01, 13 November 2020 (UTC)

Final sentence
What does "it lacks relative consistency. That is, if ApEn of one data set is higher than that of another, it should, but does not, remain higher for all conditions tested." even mean? Could someone with knowledge of this topic rewrite this to be less confusing? Porphyro (talk) 14:06, 5 June 2017 (UTC)

Confusing
In "The Algorithm" section, step 4, "x" (without boldface) is used but not defined. Are they meant to be components of the (boldface) x-vectors? Or the x-vectors themselves? Furthermore, scalars u(a) are introduced, named exactly like those in Step 1, but without being the same. Also confusing. The notation and writing in this article looks amateurish and inconsistent. Jens olav nygaard (talk) 11:24, 18 May 2020 (UTC)
 * I agree that step 4 needs work. I've tidied up earlier steps and put a tag on step 4 so that others know where to start editing. Mebden (talk) 14:42, 18 February 2022 (UTC)
 * Not sure copyedit is the right tag, considering it's pretty much exclusively math-related. ★Ama   TALK   CONTRIBS  12:41, 25 April 2022 (UTC)
 * Hello, I've copyedited the requested section. Hopefully this new explanation is better!
 * As a side note, a math-specific copyedit tag would be nice, to distinguish between prose editing and markup / LaTeX editing. I don't know if one exists. It'd be helpful for both editors and readers requesting the edits. ~ Jayowyn (talk) 04:50, 25 November 2022 (UTC)