is there a way to convert values in a column like 1,00374 to 1.00374?
In a text-editor I would search for a function like find and replace or something like this.
Have you tried use the replace funciton as shown below
In Prep, I'd just create a calculated field in a clean step:
This will create a new number.
It won't really have any formatting at this point, but once you get it into Tableau, you can format it as you like.
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