Rounding

[Jorgen Andersson]

So depending on how you want to treat negative numbers you want either "Significant digits round half down" or "Significant digits round half towards zero".

Wrong is evil and must be defeated. - Jeff Ello[^]

[Jorgen Andersson]

See my other answer, or Daves.

Wrong is evil and must be defeated. - Jeff Ello[^]

[PaulowniaK]

Cheers. I think "round half down" is the term I needed. :thumbsup:

Almost, but not quite, entirely unlike... me...

[PaulowniaK]

All values are positive, due to the nature of the application. "Round half down" was the term I was looking for. Thanks for your help. :cool:

Almost, but not quite, entirely unlike... me...

[PaulowniaK]

Thanks, "Round half down" was the term I was looking for. :)

Almost, but not quite, entirely unlike... me...

[Duncan Edwards Jones]

...or rounding to the most significant digit. (I'd suggest that we call this "politicians rounding")

[BillWoodruff]

JMK-NI wrote:

Disregard, I'm an idiot

Well, JMK-NI, don't worry too much: you are in the place for idiocy. It's kind of like a "contagious skin rash," here, on the Lounge, it breaks out in different people, and makes different people scratch in different places, while others scratch their heads. cheers, Bill

“I have diligently numbered the days of pure and genuine happiness which have fallen to my lot: They amount to 14.” Abd-Ar Rahman III, Caliph of Cordoba, circa 950CE.

[Michael Pauli]

The 1.5 -> 1 is a little strange. Except for that you can use

double MagicFormula(double x)
{
var d = Math.Log10(x);
var f = Math.Pow(10.0, d);
var res = Math.Round(x / f, 0) * f;
var res2 = Math.Round(res, 0);
return res2;
}

Michael Pauli

[Gary Wheeler]

I think the word you are looking for is 'wrong'.

Software Zen: delete this;

[newton saber]

Kind of like ceiling / floor, but that's for decimal. http://en.wikipedia.org/wiki/Floor_and_ceiling_functions[^]