At 10:22 AM -0400 10/11/07, Nathan Nobbe wrote:
On 10/11/07, tedd <<mailto:tedd@xxxxxxxxxxxx>tedd@xxxxxxxxxxxx> wrote:
At 4:18 PM -0600 10/10/07,
<<mailto:admin@xxxxxxxxxxxxxxxxxxx>admin@xxxxxxxxxxxxxxxxxxx> wrote:
I disagree. I will need to see an example where the round() is inaccurate.
You may disagree if you wish, but the php function round() is
inaccurate by definition -- all *rounding* algorithms are inaccurate.
thats why i suggested the bcmath based algorithm, as bcmath supports arbitrary
precision. i built a quick test script using the method from the
top comment of the
bcmath page, and round(). it allows for quick comparisons of the 2
algorithms and
tells you if the results are the same. i messed around w/ it a
little bit and the results
were the same every time.
Well, if the results were the same, then both exhibit the same
accuracy bias in rounding.
However, precision is not the issue. There's a difference between
precision and accuracy and I am addressing accuracy.
For example, if the answer is 4.5, then 4.4 is more accurate than
4.39999999999, but the later is more precise.
Cheers,
tedd
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