Dynamic column in measure calculation

That's easy enough.

Create a table which will store all the column names you want. This will be your slicer. Then, for all the measures you want create a table that will store their names. This will be the slicer for which measures to show (this also be used in a table visual to show all the measures in one go). You need to create a version of each of the measures that works on a particular column, like SUM, AVG, STD... whatever. Then create a single measure that will use SWITCH and the name of the selected column from the slicer to make a decision which measure version to use and then use it to calculate the value. This setup will give you the freedom to even show a matrix of all the measures and all the columns in one visual.

Best

Darek