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bellcurve module fails #8506

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ddoice opened this Issue Jun 21, 2018 · 1 comment

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@ddoice

ddoice commented Jun 21, 2018

Expected behaviour

Highcharts + BellCurve module to create a histogram.

Actual behaviour

Scatter plots nicely but histogram module fails on binning and frecuency count doesnt match, missing columns.

I have patched our own version, file histogram-bellcurve.src.js adding in line 307:

if (frequencies[x] === undefined) { frequencies[x] = 0; }

Live demo with steps to reproduce

https://jsfiddle.net/tq0wpL4y/
24 samples, adding all columns = 10, 14 missing.

Product version

highcharts 6.1

Affected browser(s)

all

@KacperMadej

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KacperMadej Jul 19, 2018

Contributor

The path presented as a wrapper - temporary workaround: https://jsfiddle.net/BlackLabel/x5ren8Lo/

Internal note:
The problem here is caused by floating point math imprecision not handled good enough in histogram-bellcurve module - some edge cases causes wrong bin detection while setting bins and different bin sort for values.

Contributor

KacperMadej commented Jul 19, 2018

The path presented as a wrapper - temporary workaround: https://jsfiddle.net/BlackLabel/x5ren8Lo/

Internal note:
The problem here is caused by floating point math imprecision not handled good enough in histogram-bellcurve module - some edge cases causes wrong bin detection while setting bins and different bin sort for values.

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