Impose restrictions on values of the Rock database. Just clicking on the button will show you all the data
1->Porosity = 1 !1->Porosity is not 1 1~2-> 1<= Porosity and Porosity <= 2 !1~2->1 < Porosity and Porosity <= 2 1~->1 <= Porosity ~2->Porosity <= 2 ~!2->Porosity < 2 You can also enter strings that are not numbers. They are interpreted differently: t->Porosity is known !t->Porosity is not known (The "t" here is arbitrary. Any non-number will do.)
foo->Find all Sample Names that contain "foo" !bar->Find all Sample Names that do not contain "bar" baz foo->Find all Sample Names that contain "baz" or "foo" baz +foo->Find all Sample Names that contain both "baz" and "foo"
Please compare this syntax with the syntax for lists of intervals for numeric categories.
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