Section 1 - Clauses, Types and Rules

1.6 The Experimentation Debugger

and

fixedCost ?prd ?fc\

marginalCost ?prod ?mc\

inInterval ?vol 0 100 10\

is ?totalCost ?fc + ?vol * ?mc

If you have not already seen the debugger, try it now. Evaluate the following.

and

fixedCost ?prod ?fc\

marginalCost ?prod ?mc\

inInterval ?vol 0 100 10\

is ?totalCost ?xxx + ?vol * ?mc

If you try this version you will get an SDML Experimentation Debugger displaying the line it had a problem with and also the current bindings of the variables at the bottom right. The debugger looks like this:

As it would be impossible to list all the possible bindings of the clause is ?totalCost ?xxx + ?vol * ?mc for ?xxx as well as ?totalCost being unknown (being an infinite number of them!), the syntax for primitives such as is is restricted so certain variables have to be known already (such as ?vol above), these are called instantiated variables.

Close the debugger window. Using clauses such as those above as well as any of the clauses you find listed in the Database page in the browser, try to get some of the following results using the Experiment page.

• the producers that have marginal costs between 5 and 10 per unit

• the producers that can produce at an average cost per item of less than 5200 for quantities of 50 unit

• the marginal costs of all producers with fixed costs above 150

Generated with CERN WebMaker