Grid tables can be weighted. Normally, they’ll be part of a weighted run and the weighting characteristics are defined using ordinary axes such as age, sex or region. If you need to define a weighting matrix specifically for a grid you must do so using a dummy axis since Quantum does not accept grid axes on wm statements.

The dummy axis must have the same number of elements as there are cells in the grid axis. You can create it by using a col statement that refers to a blank column. For example, if the grid axis is:

define the dummy axis as:

Then create a weighting matrix for the grid but instead of using the name of the grid axis on the wm statement you use the name of the dummy axis:

To weight the grid, name the matrix on the tab statement as for any other table:

When the table is created, respondents who rated brand A as excellent are given a weight of 1.25, respondents who weighted brand A as satisfactory are given a weight of 1.16, and so on.