[Solved] Wrongly rounded numbers

[ManeXi]

I use a function that should work rightly on rounding numbers, but for some reason it rounds the numbers wrongly, instead of putting 0.56 it puts 0.569999999999999999999999 or 0.56000000000000000000000000001

function math.round(number, decimals, method) 
    decimals = decimals or 0 
    local factor = 10 ^ decimals 
    if (method == "ceil" or method == "floor") then return math[method](number * factor) / factor 
    else return tonumber(("%."..decimals.."f"):format(number)) end 
end 

The number is displayed in the scoreboard.

Edited June 12, 2016 by Guest

[AlexTMjugador]

What number are you trying to round? Rounding 0.56 under default parameters works fine for me.

Edited June 12, 2016 by Guest

[Castillo]

You can set the amount of decimals you want it to return.

Like this:

math.round ( 0.569999999999999999999999, 2 ) 

[ManeXi]

I'm rounding player's KDR

function setkdr ( player ) 
    local dea = getElementData(player,"Deaths") 
    local kil = getElementData(player,"Kills") 
    local kdr = kil/dea 
    setElementData(player,"K/D Ratio", math.round(kdr, 2)) 
    local acc = getPlayerAccount(player) 
    if not isGuestAccount(acc) then 
        setAccountData(acc,"K/D Ratio", math.round(kdr, 2)) 
    end 
end 

[Castillo]

And the result is...?

[AlexTMjugador]

You are probably experiencing some kind of event number transfer precision issue. I believe that this is the same issue that makes MTA: SA editor save numbers with a ridiculously high decimal count, even if you only use two or three decimals.

You can workaround that limitation in two ways:

1. Treat the number as a string, and transfer it to the client as a string.
   
2. Let the client round the K/D ratio for display, instead of the server.

[ManeXi]

And the result is...?

An example right now would be:

Kills = 232

Deaths = 395

result is: 0.587341 so rounded should be 0.59 but instead of it it puts 0.5899997

Edited June 12, 2016 by Guest

[Castillo]

Strange, I ran the code on: http://www.lua.org/cgi-bin/demo

And the output was: 0.59.

[ManeXi]

Strange, I ran the code on: http://www.lua.org/cgi-bin/demo

And the output was: 0.59.

http://i.imgur.com/X59pOcm.jpg

[Tomas]

Strange, I ran the code on: http://www.lua.org/cgi-bin/demo

And the output was: 0.59.

http://i.imgur.com/X59pOcm.jpg

  
    setElementData(player,"K/D Ratio", tostring(math.round(kdr, 2))) 
  

[ManeXi]

Seems that setting it as string fixed it, thanks alot <3