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VivianaTudora
Frequent Visitor

Change positives to negatives and the other way around

Hi all, 

 

I have a column with both negative and positive values and I need to have them changed to the opposite. The positives are actually negative and negatives are positive. I know I can change them all to absolute, but can't think how to also store the positives as negative?

Hope this makes sense, no idea why the values are stored like this in the database. 

 

Thank you!

1 ACCEPTED SOLUTION
Zubair_Muhammad
Community Champion
Community Champion

3 REPLIES 3
Anonymous
Not applicable

I don't like creating a new custom column to multiply the old value by -1, so I solved the problem by transforming the value in place using a trivial custom function "Negate"

 

let
    Negate = ( x ) => try -1 * x otherwise null,

    Source = Table.FromRecords({
        [CustomerID = 1, Name = "Bob",  Value = 305 ],
        [CustomerID = 2, Name = "Jim",  Value = -100 ],
        [CustomerID = 3, Name = "Paul", Value = 0.305 ],
        [CustomerID = 4, Name = "Pau2", Value = "0.305" ],
        [CustomerID = 5, Name = "Pau3", Value = null ]
    }),

    Negated = Table.TransformColumns(Source, {{"Value", Negate}})

in
    Negated
Zubair_Muhammad
Community Champion
Community Champion

@VivianaTudora

 

You can simply multiply them with -1.

Isn't it?

You're right! Didn't realise it's so simple. 

Thanks a lot! 🙂

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