UI Table can not choose short column format

Hello,

I'm making a school work with appdesign, and I'm having a problem displaing my table with correct format.

Here is an image:

I want to round and only display 4 decimal numbers. (eg: 0.0024)

I have tried:

app.Matrix.ColumnFormat = {'short' 'short' 'short' 'short' 'short' 'short' 'short' 'short' 'short' 'short' 'short' 'short' 'short' 'short' 'short' }

And didn't worked, the result was this:

I have tried evertying, can someone help please?

Thanks.