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|context> => |context: average>

supported-ops |*> => |op: ave> + |op: apply-weights> + |op: weighted-ave> + |op: tmp-ave> + |op: harmonic-mean>
ave |*> #=> arithmetic(count-sum "" |_self>,|/>,count "" |_self>)
apply-weights |*> #=> mult(""|_self>, weights|_self>)
weighted-ave |*> #=> arithmetic(count-sum apply-weights |_self>,|/>,count-sum weights |_self>)
tmp-ave |*> #=> arithmetic(count-sum 100 "" |_self>,|/>,count 100 "" |_self>)
harmonic-mean |*> #=> arithmetic(count "" |_self>,|/>,count-sum invert "" |_self>)

supported-ops |u> => |op: >
 |u> => |a> + 2.0|b> + 3.0|c> + 4.0|d>

supported-ops |x> => |op: > + |op: weights>
 |x> => |a> + 2.0|b> + 3.0|c> + 4.0|d>
weights |x> => 0.1|a> + 0.1|b> + 0.7|c> + 0.1|d>

supported-ops |y> => |op: > + |op: weights>
 |y> => |a> + 2.0|b> + 5.0|c> + 7.0|d>
weights |y> => 2.0|a> + 14.0|b> + 8.0|c> + 32.0|d>

supported-ops |tmp> => |op: >
 |tmp> => 0.1|a> + 0.1|b> + 0.7|c> + 0.1|d>

supported-ops |z> => |op: >
 |z> => 60.0|a> + 40.0|b>
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