summarize numbers

[Dolinho]

how can I summarize?

xr = math.floor(x) 
yr = math.floor(y) 
zr = math.floor(z) 

ex: 1603.9251708984,1829.6070556641,10.8203125 I want so 1603.925,1829.607,10.82

addEventHandler ("onClientGUIClick", root, 
function() 
    if (source == get) then 
        if guiCheckBoxGetSelected(Button[1]) == true then 
        local x,y,z = getElementPosition (getLocalPlayer()) 
        local rx, ry, rz = getElementRotation(getLocalPlayer()) 
        xr = math.floor(x) 
        yr = math.floor(y) 
        zr = math.floor(z) 
        rot = math.floor(rz) 
        guiSetText (Pos, xr..","..yr..","..zr.." R:"..rot ) 
        else 
        local x,y,z = getElementPosition (getLocalPlayer()) 
        guiSetText (Pos, (x)..","..(y)..","..(z) ) 
        end 
    end 
end 
) 

[Rataj]

round(1603.9251708984, 3) 

This will return 1603.925

[Dolinho]

thank you help me

[GTX]

You also need a function.

function round(num, idp) 
  return tonumber(string.format("%." .. (idp or 0) .. "f", num)) 
end