Topic: Poll results percentages

[Ben_S]

The results of poll votes dont seem to add upto 100%. A poll running on my board has just been mentioned on the radio, they also saw fit to mention that the results added up to 103%.

[Daniel D.]

That's a known problem since YaBB Gold or SE. If I remember right, the reason are the rounded numbers.

[Christian Land]

Try what happens if you replace:

Code: [Select]

'percent' => round($bar, $precision),
with

Code: [Select]

'percent' => round(($option[1] * 100) / $divisor, $precision),
in Display.php

[Ben_S]

That's a known problem since YaBB Gold or SE. If I remember right, the reason are the rounded numbers.

Aye, certainly been there a while, just thought it was funny hearing it on the radio.

Try what happens if you replace:
<>

Will try it when I finnish work.

[Ben_S]

Try what happens if you replace:

Code: [Select]

'percent' => round($bar, $precision),
with

Code: [Select]

'percent' => round(($option[1] * 100) / $divisor, $precision),
in Display.php

That fixes it .

[Christian Land]

Fine

[[Unknown]]

 ! The percentages for a poll now add up a little better.

(I changed a different part, but basically the same way.)

-[Unknown]

[Skoen]

Noticed that too. In a poll where there are 24 votes in it, the total percent is 97% instead 100%. Might try the fix myself, and that made the total to be 99,9%

[Christian Land]

The problem is, that there will always be situations where you won't get a correct result....

But with the fix, the difference to 100% will be smaller.... so i guess its OK...

[Springer]

How far does it carry a number before it rounds?

[Christian Land]

How far does it carry a number before it rounds?

The round function only uses a precision of 1... so all numbers get rounded at the first digit after the decimal point. I tested the above fix a little bit, and all my tests gave results between 99,9% and 100%... and it really doesn't matter with what precision the values get rounded... there are situations where the percentages are always false...

for example: 3 people vote for 3 different options... you will always end up with wrong numbers... the current beta of SMF displays 33% for each option... the fixed version will show 33,3%.... even if you change the precision to 1000, you'll still get the same result.... so who cares?