empty cell

I have a column with formulas.
When formulas return empty cell (""), the chart seems to handle
it as a 0. I do not want to display those data points at all.
I tried to use NA() instead The chart seemed to be o.k but now I have a
problem finding MAX/MIN Values of this column – because I have there now both
numbers and #N/A.
Thanks
Elan

"Elan" <[email protected]> wrote in message
news:[email protected]...
> I have a column with formulas.
> When formulas return empty cell (""), the chart seems to handle
> it as a 0. I do not want to display those data points at all.
> I tried to use NA() instead The chart seemed to be o.k but now I have a
> problem finding MAX/MIN Values of this column â?" because I have there now
both
> numbers and #N/A.
> Thanks
> Elan

You can use a UDF like the one below. It will ignore things in the passed
range which are not numbers.

Public Function myMax(ByVal r As Range) As Variant
On Error Resume Next
Dim cell As Range
Dim maxval As Double
Dim ValueFound As Boolean

maxval = -999999999999#
ValueFound = False

For Each cell In r
If cell.Value > maxval Then
maxval = cell.Value
ValueFound = True
End If
Next cell

If ValueFound Then
myMax = maxval
Else
myMax = CVErr(xlErrNum)
End If
End Function

you can use = max(if(iserror(a1:a20,"",a1:a20)
changing the range to what you need
You can use the min function similarily

"Elan" wrote:

> I have a column with formulas.
> When formulas return empty cell (""), the chart seems to handle
> it as a 0. I do not want to display those data points at all.
> I tried to use NA() instead The chart seemed to be o.k but now I have a
> problem finding MAX/MIN Values of this column – because I have there now both
> numbers and #N/A.
> Thanks
> Elan

Fredrik Wahlgren wrote...
....
>You can use a UDF like the one below. It will ignore things in the
passed
>range which are not numbers.

Why use a UDF rather than an array formula like

=MAX(IF(ISNUMBER(rng),rng))

?

More generally, if there's missing data in chart series, better to use
separate ranges for chart series and downstream calculations, with the
chart ranges derived from the downstream calculation ranges so that
nonnumbers are converted to #N/A.


>Public Function myMax(ByVal r As Range) As Variant

If there were good reason to use a udf, why not make it as flexible as
the built-in MAX function? That is, why isn't the argument a
ParamArray, which would allow variable numbers of arguments as well as
individual numbers and arrays as well as ranges?

"Harlan Grove" <[email protected]> wrote in message
news:[email protected]...
> Fredrik Wahlgren wrote...
> ...
> >You can use a UDF like the one below. It will ignore things in the
> passed
> >range which are not numbers.
>
> Why use a UDF rather than an array formula like
>
> =MAX(IF(ISNUMBER(rng),rng))
>
> ?

Right. Your solution is nicer

/Fredrik

Thanks for your answers, but I still could not calculte Max/min values.
for example: A1=2 A2=8 A3=4 A4=#N/A
how can i find max value?
Note: I can not add another column.

"Elan" <[email protected]> wrote in message
news:[email protected]...
> Thanks for your answers, but I still could not calculte Max/min values.
> for example: A1=2 A2=8 A3=4 A4=#N/A
> how can i find max value?
> Note: I can not add another column.
>
>

Have you tried the UDF?

/Fredrik