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I have an Excel-File with some tables to calculate article-prices. In one of these tables, the user can define how to calculate a price.

For example, power query should evaluate then MIN, MAX or AVG price from a count of competitors (this is no problem and works fine). This calculated price is the initial value for further calculations. The User can enter an Operator (+, -, *, /) and an operant. enter image description here

In PQ I combine and transform the table with other tables an get and result:

enter image description here

I want to use the operator in a new calculated column, something like that:

= [Preis_MIN] [Operator] [Wert]

I know, that I can use IF()-Function(s), but if's are very slow, and at the end the table will have thousands of rows.

Is there a way to convert a TEXT in an operator? Or use

Text.Combine({Text.From([Preis_MIN]), [Operator], Text.From([Wert])}, " ") and convert the (Text) result in a formula?

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You can use Expression.Evaluate. eg:

Expression.Evaluate(Number.ToText([Value]) & [operator] & Number.ToText([operand]))

enter image description here

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3 Comments

This works with german decimal-notation: Expression.Evaluate(Text.Replace(Number.ToText([Value]),",",".") & [operator] & Text.Replace(Number.ToText([operant]),",","."))
@Chris Glad to help. I wonder if it might be more efficient to convert the Value and operant columns first, so as to avoid doing those steps in the Evaluate. I don't know; just wondering.
I will try both in the file, I'm with you that it would be better to convert first. But for a first solution it was perfect :)

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