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Frequent Visitor

## which calculated column has the closest value to another column

Hi all,

I've got 5 calculated columns and one column which I consider as my "Lookup value". Now I would like to make two more calculated columns:

1. with the value of the column that is closest to my lookup value

2. with the column name of the column that is closest to my lookup value.

I did something similar in Excel (see below). Does anyone know a DAX formula (or another solution) which I can use in Power BI in order to replicate what I've done in Excel?

 Lookup value column1 column 2 column3 column4 column5 Closest column Value closest column 4 1 2 3 4 5 column4 4 =LOOKUP(G5,I5:M5,I4:M4) =LOOKUP(G5,I5:M5,I5:M5)
1 ACCEPTED SOLUTION
Community Champion

@BartB

```Closest Column =
VAR MyTable =
UNION (
ROW ( "Column Name", "Column1", "Value", Table1[column1] ),
ROW ( "Column Name", "Column2", "Value", Table1[column2] ),
ROW ( "Column Name", "Column3", "Value", Table1[column3] ),
ROW ( "Column Name", "Column4", "Value", Table1[column4] ),
ROW ( "Column Name", "Column5", "Value", Table1[column5] )
)
RETURN
CONCATENATEX (
FILTER ( MyTable, [Value] = Table1[Closest Value] ),
[Column Name],
", "
)```

Regards
Zubair

6 REPLIES 6
Microsoft Employee

Hi @BartB,

1. Is the Lookup value stable? Always in a column?

2. Where is the lookup value? In another table?

3. Is there only one Lookup value? Or each row has a Lookup value?

4. How to evaluate the closest?

Best Regards,

Dale

Community Support Team _ Dale
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Frequent Visitor

1. Is the Lookup value stable? Always in a column?

Yes, the lookup value is stable. It's a calculated column with the result of a lookup value to another column

2. Where is the lookup value? In another table?

The lookup value itself is in the same table. However, it's a calculated column and thus it's not in the Query Editor.

3. Is there only one Lookup value? Or each row has a Lookup value?

Each row has a lookup value

4. How to evaluate the closest?

Ideal would be literally closest to... (3.9 is closer to 4 than 4.2). But if this is not possible I would already be sattisfied with an approximate match as in the vlookup formula in Excel.

If you have any further questions, let me know.

BR,
Bart

Microsoft Employee

Hi @BartB,

Best Regards,

Dale

Community Support Team _ Dale
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Community Champion

@BartB

Give this a shot

```Closest Value =
VAR fig = 1000000000
VAR Positives =
UNION (
ROW (
"BartB", IF (
Table1[Lookup value] >= Table1[column1],
Table1[Lookup value] - Table1[column1],
fig
)
),
ROW (
"BartB", IF (
Table1[Lookup value] >= Table1[column2],
Table1[Lookup value] - Table1[column2],
fig
)
),
ROW (
"BartB", IF (
Table1[Lookup value] >= Table1[column3],
Table1[Lookup value] - Table1[column3],
fig
)
),
ROW (
"BartB", IF (
Table1[Lookup value] >= Table1[column4],
Table1[Lookup value] - Table1[column4],
fig
)
),
ROW (
"BartB", IF (
Table1[Lookup value] >= Table1[column5],
Table1[Lookup value] - Table1[column5],
fig
)
)
)
VAR Positivevariances =
MINX ( Positives, [BartB] )
VAR Negatives =
UNION (
ROW (
"BartB", IF (
Table1[Lookup value] < Table1[column1],
Table1[Lookup value] - Table1[column1],
- fig
)
),
ROW (
"BartB", IF (
Table1[Lookup value] < Table1[column2],
Table1[Lookup value] - Table1[column2],
- fig
)
),
ROW (
"BartB", IF (
Table1[Lookup value] < Table1[column3],
Table1[Lookup value] - Table1[column3],
- fig
)
),
ROW (
"BartB", IF (
Table1[Lookup value] < Table1[column4],
Table1[Lookup value] - Table1[column4],
- fig
)
),
ROW (
"BartB", IF (
Table1[Lookup value] < Table1[column5],
Table1[Lookup value] - Table1[column5],
- fig
)
)
)
VAR Negativevariances =
MAXX ( Negatives, [BartB] )
RETURN
IF (
Positivevariances = 0,
Table1[Lookup value],
IF (
Positivevariances <= ABS ( Negativevariances ),
Table1[Lookup value] - Positivevariances,
Table1[Lookup value] - Negativevariances
)
)```

Regards
Zubair

Community Champion

@BartB

```Closest Column =
VAR MyTable =
UNION (
ROW ( "Column Name", "Column1", "Value", Table1[column1] ),
ROW ( "Column Name", "Column2", "Value", Table1[column2] ),
ROW ( "Column Name", "Column3", "Value", Table1[column3] ),
ROW ( "Column Name", "Column4", "Value", Table1[column4] ),
ROW ( "Column Name", "Column5", "Value", Table1[column5] )
)
RETURN
CONCATENATEX (
FILTER ( MyTable, [Value] = Table1[Closest Value] ),
[Column Name],
", "
)```

Regards
Zubair

Frequent Visitor

You can do this with Power Query, but not DAX. Sorry I do not have time to provide a full solution right now, but I thought this tip might give you hope and save you time finding a solution.