POV-Ray : Newsgroups : povray.binaries.images : A method to plot histograms for patterns / functions. : Re: A method to plot histograms for patterns / functions. Server Time
10 Dec 2023 22:06:02 EST (-0500)
  Re: A method to plot histograms for patterns / functions.  
From: William F Pokorny
Date: 4 Sep 2023 22:11:36
Message: <64f68e58$1@news.povray.org>
On 9/4/23 14:26, Bald Eagle wrote:
> Well, there's a histogram macro in math.inc
> Histogram(ValArr, Intervals): This macro declares a global, 2D array named
> HistogramArray. The first value in the array is the center of the interval/bin,
> the second the number of values in that interval.
> Parameters:
> ValArr = An array with values.
> Intervals = The desired number of intervals/bins.
> Not sure if that's what you were looking for.
> - BW

Thanks for the prompt! I was aware of it. In the povr fork it is located 
in an include file called arraystatistics.inc almost completely 
re-written by Tor Olav Kristensen back in mid 2021.

On seeing your post though, I immediately had the thought: "Ya know Bill 
(the me version of Bill)..., you didn't code up anything using this 
include file and compare performance."

Aside: I need a slightly modified version of the macro.

My thinking was anything mostly an all functions alternative would be 
faster than a pure parser method. However, with some hacked, not quite 
right, pure parser code just now - it looks like what I have coded is 
running a lot (~10x) slower! I'll play with this stuff more tomorrow. 

Bill P.

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