Box And Whisker Chart Calcuation Seems To Be Wrong(Box And Whisker Chart)

[Dinesh M]

Hi,

 

As per the documentation of "Box and Whisker charts" (http://docs.fusioncharts.com/powercharts/ > given here) caclulation show for calculation median and lower Quartile is seems to be wrong, I have checked the documentation on wikipedia as well (http://en.wikipedia.org/wiki/Five-number_summary).

 

As per the example given in the above wikipedia link following data set is considered:

 

 

0, 0, 1, 2, 13, 27, 61, 63

 

and result of the above data set is coming as

 

0, 0.5, 7.5, 44, 63 (output as per wikipedia)

 

But if Input the above data set(0, 0, 1, 2, 13, 27, 61, 63) then the following output is coming(shown on tool tip)

 

 

0, 0.25, 7.5, 52.5, 63 (output as per box and whisker chart)

 

So is this the bug in box and whisker charts? or Am I missing something here.

 

Also let me know if it is possible in box and whisker chart to calculate Q1 and Q3 values or median also.

 

 

Thanks,

 

Dinesh

 

 

 

• Median (Q2): N+1/2 (where N=total number of elements in a set of data)
• Lower Quartile (Q1): N+1/2 (where N=total number of elements in a set of data)

[Dinesh M]

Hi,

 

As per the documentation of "Box and Whisker charts" (http://docs.fusionch...om/powercharts/ > given here) caclulation show for calculation median and lower Quartile is seems to be wrong, I have checked the documentation on wikipedia as well (http://en.wikipedia....-number_summary).

 

As per the example given in the above wikipedia link following data set is considered:

 

 

0, 0, 1, 2, 13, 27, 61, 63

 

and result of the above data set is coming as

 

0, 0.5, 7.5, 44, 63 (output as per wikipedia)

 

But if Input the above data set(0, 0, 1, 2, 13, 27, 61, 63) then the following output is coming(shown on tool tip)

 

 

0, 0.25, 7.5, 52.5, 63 (output as per box and whisker chart)

 

So is this the bug in box and whisker charts? or Am I missing something here.

 

Also let me know if it is possible in box and whisker chart to calculate Q1 and Q3 values or median also.

 

 

Thanks,

 

Dinesh

 

 

 

• Median (Q2): N+1/2 (where N=total number of elements in a set of data)
• Lower Quartile (Q1): N+1/2 (where N=total number of elements in a set of data)

 

 

 

Can any one reply to the above post, as I am in the process of purchasing the license for Fusion Charts all library's and before that I need to know the justification for the calulation of Box and Whisker chart.

 

Thanks,

 

Dinesh

[Swarnam]

Hi Dinesh,

 

We are looking into the issue.

 

We would update you soon.

 

Thank you for your continued patience and support.