Custom RoundUp function Error

Juggler_IN

Active Member
Joined
Nov 19, 2014
Messages
347
Office Version
  1. 2003 or older
Platform
  1. Windows
The following RoundtoUp code is failing in few specific cases as compared with Excel RoundUp:

Code:
Public Function RoundtoUp( _
       ByVal myNum As Double, _
       Optional ByVal myFac As Double = 1#) As Double


    RoundtoUp = (Fix(myNum * CDec(10# ^ myFac)) + IIf(myNum = Fix(myNum * CDec(10# ^ myFac)), 0, Sgn(myNum))) / CDec(10# ^ myFac)


End Function

NumberDigitsRoundtoUpRoundUp (Excel)
0.0099,1Ok'0.1'0.1
0.0099,2Ok'0.01'0.01
0.0099,3Ok'0.01'0.01
0.0099,4Error'0.01'0.0099
-0.0714285714,2Ok'-0.08'-0.08
-1.2345,3Ok'-1.235'-1.235
1.01234012340125,14Error'1.01234012340126'1.01234012340125

<tbody>
</tbody>

Could not debug the reason for such a behavior. What is a possible fix?
 
Last edited:

Excel Facts

Which came first: VisiCalc or Lotus 1-2-3?
Dan Bricklin and Bob Frankston debuted VisiCalc in 1979 as a Visible Calculator. Lotus 1-2-3 debuted in the early 1980's, from Mitch Kapor.
Via formula:

A​
B​
C​
D​
1​
Number
Digits
Result
2​
0.0099​
1​
0.01​
C2: =--TEXT(A2, "0." & REPT(0, B2 - 1) & "E+0")
3​
0.0099​
2​
0.0099​
4​
0.0099​
3​
0.0099​
5​
0.0099​
4​
0.0099​
6​
-0.071428571​
2​
-0.071​
7​
-1.2345​
3​
-1.23​
8​
1.012340123​
14​
1.012340123​

Via UDF:

Code:
Function SigDig(d As Double, ByVal n As Long) As Double
  If n < 1 Then n = 1
  If n > 16 Then n = 16
  SigDig = Format(d, "0." & String(n - 1, "0") & "E+0")
End Function
 
Upvote 0
UDF not working with other numbers. There is a mismatch wrt to Excel RoundUp.

Say, 1.49999999999999,0 with roundup = 2. With SigDig it gives 1. I am looking a RoundUp equivalent.
 
Upvote 0
That formula/function rounds to specified significant diigits; did you want to round up? Sorry if I misunderstood.
 
Upvote 0
Yes, looking for RoundUp, i tried addressing floating-point part by using CDec, yet with some numbers not getting the right answer.
 
Upvote 0
I'd punt and use the Excel function:

Code:
Public Function RoundtoUp(d As Double, n As Long) As Double
  RoundtoUp = WorksheetFunction.RoundUp(d, n)
End Function
 
Upvote 0
This option I had :) but was looking for a custom UDF. Coudn't understand why the formula was failing in certain scenarios.
Code:
[COLOR=#333333]RoundtoUp = (Fix(myNum * CDec(10# ^ myFac)) + IIf(myNum = Fix(myNum * CDec(10# ^ myFac)), 0, Sgn(myNum))) / CDec(10# ^ myFac)[/COLOR]
 
Upvote 0

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