Jenkins: Selecting nodes based on target

[Vijay Hiremath]

Hi All,

I have a Configuration Matrix project with following parameters

Matrix Combination Parameter
Name: MATRIX
shortcut links: All, None
By combination filter: ?

1. User-defined axis
   target: a, b
2. Slaves
   HOSTS: a-x-1, a-y-1, a-z-1
          b-x-1, b-y-1, b-z-1

what should I write in "By combination filter"
so that when I click:
1. target "a" I can get check box selected on
   a-x-1, a-y-1, a-z-1
2. target "b" I can get check box selected on
   b-x-1, b-y-1, b-z-1

Regards

Vijay