Does anyone know how to change the decimal separator for the round funtion to german format (comma).
As per Tableau, for round function the decimal separator is dot (.). I have changed my locale to German. All the other number formats appear with decimal separator as comma(,) but it is not applied to the round function.
From the above image, I would like to have my number appear as 3,1 instead of 3.1.
Since I need to implement different number format for a list of measure values ( few to be in %, few as whole number and few as decimal numver), I am using calculated field for displaying the measure values in customized number format. so that is why the option os right clicking and using format does not apply in my case.
I don't understand your question. The screenshot you are showing is just a help text, and that is indeed using the US syntax. However the ROUND function uses the decimal value correctly as you can see in the screenshot below.