Issue while plotting boxplot

[ajmalmajeed97]

Expected behavior

In chart.js while plotting boxplot with different datasets, some of the data is not shown in the chart. Tried with many other datasets, still facing same issue. Please help me to solve this

It should plot boxplot with any datasets ,irrespective of the data(Number Dataset)

Current behavior

In chart.js while plotting boxplot with different datasets, some of the data is not shown in the chart. Tried with many other datasets, still facing same issue. Please help me to solve this

I have tried plotting boxplot with different datasets, for some dataset its not plotting correctly. I think there is some issue in chart.js.

For the same dataset have tried plotting boxplot using Highchart ,there the data is showing correct

Using Chart.js :-[https://codepen.io/sgratzl/pen/QxoLoY]
Using Highchart.js:-[https://jsfiddle.net/fo481t6j/1/]

[ajmalmajeed97]

Codepen link for chart.js((v4.0.1, also tried with 3.5.1):-https://codepen.io/ajmalmajeed/pen/xxzyzNM
Js fiddle link for Highchartjs:-https://jsfiddle.net/fo481t6j/1/
Dataset used:-[
[
92.24,
93.16,
93.77,
95.53,
98.64
],
[
84.87,
91.87,
93.78,
94.93,
96.01
],
[
89.36,
90.66,
93.15,
94.44,
95.36
],
[
90.66,
91.58,
92.59,
94.66,
96.49
],
[
87.63,
91.08,
93.21,
93.7,
96.38
],
[
86.47,
93.08,
94.88,
95.49,
96.89
],
[
88.11,
92.96,
93.91,
95.78,
99.43
],
[
88.72,
93.28,
94.51,
95.75,
100
],
[
88.17,
93.35,
94.54,
95.89,
96.58
],
[
92.16,
94.08,
95.04,
95.67,
96.87
],
[
93.14,
93.31,
94.63,
95.35,
95.96
],
[
84.64,
84.74,
84.87,
91.25,
96.34
],
[
90.11,
91.2,
92.1,
93.25,
93.98
]
]

[sgratzl]

in your codepen you are defining only 5 labels, so it only renders five boxplots? or am I missing something?

[sgratzl]

for the whiskers and boxplot it depends how you configure this plugin:

chartjs-chart-boxplot/src/data.ts

Lines 116 to 137 in e3be15f

	/**
	* from the R doc: this determines how far the plot ‘whiskers’ extend out from
	* the box. If coef is positive, the whiskers extend to the most extreme data
	* point which is no more than coef times the length of the box away from the
	* box. A value of zero causes the whiskers to extend to the data extremes
	* @default 1.5
	*/
	coef?: number;
	/**
	* the method to compute the quantiles.
	*
	* 7, 'quantiles': the type-7 method as used by R 'quantiles' method.
	* 'hinges' and 'fivenum': the method used by R 'boxplot.stats' method.
	* 'linear': the interpolation method 'linear' as used by 'numpy.percentile' function
	* 'lower': the interpolation method 'lower' as used by 'numpy.percentile' function
	* 'higher': the interpolation method 'higher' as used by 'numpy.percentile' function
	* 'nearest': the interpolation method 'nearest' as used by 'numpy.percentile' function
	* 'midpoint': the interpolation method 'midpoint' as used by 'numpy.percentile' function
	* @default 7
	*/
	quantiles?: QuantileMethod;

e.g. coef: 0 will extend the whiskers to their extremes instead of 1.5 IQR

[ajmalmajeed97]

@sgratzl I tried changing the "coeff" variable in same file, Still the boxplot is incorrect, if you check the second boxplot the value is different.

[sgratzl]

I still don't understand what "incorrect" means? can you post screenshot/values what the current boxplots are and what they supposed to be?|

[ajmalmajeed97]

[ajmalmajeed97]

Hi if you check the second dataset, lowest value is 84.87,But while plotting boxplot, the graph doesn't show this value in chart(Please check second boxplot)

[ajmalmajeed97]

I tried editing "coef" variable to zero, but still its not working. Please check

[ajmalmajeed97]

@sgratzl

[ajmalmajeed97]

@sgratzl Above picture shows the correct boxplot ,if you check the second boxplot you can see difference in values

[sgratzl]

when I plot the second dataset in R in looks the same as in this plugin:

since this plugin is modeled by default as R, I think it is correct.

However, when I set the coef to 0 (i.e. extend whiskers to min max:

https://codepen.io/sgratzl/pen/ZERwEBX

[ajmalmajeed97]

@sgratzl Thanks a lot, Its working now.

[ajmalmajeed97]

By using 'coef' to zero, length of whiskers can be extended.Thanks @sgratzl