Help with workspace data extraction shortcut

I am trying to extract data from the workspace from various possible locations.

X.output.name.param1(:,end)

X.output.name.param2(:,end)

:

X.output.name.paramN(:,end)

If possible, I would like to try access it via a named parameter, like below.

line 1: param = 'param2';

line 2: y = X.output.name.(param);

Doing this partly appears to work. I can see my data as a 25x3 matrix.

But how do i home in on the 3rd 'end' column by editing line 2, and not line 1?

Regards, Dave