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usertest3_alg_gprank.js
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usertest3_alg_gprank.js
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//IDEA If the dregs are too large (>=5?) then use alt. methods on just the dregs: cluster, collab-filters
var gprankalg = (function () {
"use strict";
var da = {
algname: 'GPRank',
um: {},
db: [],
umneedclustering: true,
hasdregs: -1
};
da.onDataSetChange = function () {
da.um = {};
da.umneedclustering = true;
da.hasdregs = -1;
};
da.onDataSetDocChange = function (dbrawitem) {
if (da.umneedclustering === true || da.um.length === 0) {
da.db = doClustering(dbrawitem);
da.umneedclustering = false;
} else {
da.db = da.doGroupingAndOrdering(dbrawitem);
}
};
da.umRecord = function (hasmovedx) {
var t = [];
//IDEA rethink what we do with hasmovedx: perhaps it updates weights at a lesser amount? Or not at all?
//if (hasmovedx) {
if (true) {
da.db.forEach(function (y, groupnum) {
y.forEach(function (z) {
t.push( [z[0], groupnum] );
});
});
t.forEach(function (aterm, aindex) {
t.forEach(function (bterm, bindex) {
var gprankentry;
// Skip if equal or aterm > bterm (alphabetical comparison)
if (aterm[0].toLowerCase() < bterm[0].toLowerCase()) {
gprankentry = da.umGet(aterm[0], bterm[0]);
if (gprankentry.confirmations < 1) {
gprankentry.confirmations = 1;
gprankentry.gprank = aindex < bindex ? 0.6667 : 0.3333;
gprankentry.group = aterm[1] === bterm[1] ? 0.6667 : 0.3333;
} else {
gprankentry.confirmations++;
if (aindex < bindex) {
gprankentry.gprank += (1.0 - gprankentry.gprank) / 2;
} else {
gprankentry.gprank /= 2.0;
}
if (aterm[1] === bterm[1]) {
gprankentry.group += (1.0 - gprankentry.group) / 2;
} else {
gprankentry.group /= 2;
}
}
da.umSet(aterm[0], bterm[0], gprankentry);
}
});
});
da.umneedclustering = false;
}
};
da.doGroupingAndOrdering = function (t) {
var t, insertmaxgroupa = -1, insertmaxgroupb = -1, insertmaxamount = 0.0, ig, igcount, g = [], dregs = [], d = [], safloor;
// Copy t
t.forEach (function (te) {
d.push(te);
});
// Shuffle - this is to test that the alg works irrespective of incoming order
d.sort (function (a, b) {
return Math.random() < 0.5 ? -1 : 1;
});
//TODO Simulated annealing to find best groups? (reduces jitter with GPRank) - place all groups in singleton groups. Anneal to combine.
/* MAKES NO DIFFERENCE TO ORDER FIRST BY CONFIRMATIONS ASCENDING
// Order by confirmations ascending
d.sort (function (a, b) {
var ac = 0, bc = 0;
ac = d.reduce (function (pv, cv) {
var r = pv, gprankentry;
gprankentry = da.umGet(a[0], cv[0]);
if (gprankentry.confirmations > 0) {
r += (gprankentry.confirmations / 2.0)
}
return r;
}, 0.0);
bc = d.reduce (function (pv, cv) {
var r = pv, gprankentry;
gprankentry = da.umGet(b[0], cv[0]);
if (gprankentry.confirmations > 0) {
r += gprankentry.confirmations;
}
return r;
}, 0.0);
return ac < bc ? -1 : 1;
});*/
// Group
// Create initial groups
d.forEach (function (de, di) {
if (da.umExists(de[0])) {
g.push([ de ]);
} else {
dregs.push(de);
}
});
// Look for the best items to combine
safloor = 1.0;
while (safloor > 0.50) {
insertmaxgroupa = -1;
insertmaxgroupb = -1;
insertmaxamount = 0.0;
g.forEach (function (ge, gi) {
// if (ge.length === 1) {
if (ge.length > 0) {
g.forEach (function (he, hi) {
if (gi !== hi && he.length > 0) {
igcount = 0;
ig = he.reduce (function (pv, cv) {
var r = pv, gprankentry;
gprankentry = da.umGet(ge[0][0], cv[0]);
if (gprankentry.group !== undefined) {
// r += gprankentry.group;
//The valuing function goes in here (more confirmations means we expect more certainty)
if (gprankentry.group > 0.5) {
r += (0.5 + ((gprankentry.group - 0.5) / Math.min(gprankentry.confirmations, 7)));
} else {
r += gprankentry.group;
}
igcount++;
}
return r;
}, 0.0);
if ((igcount > 0 && ig / igcount > insertmaxamount) || (Math.abs((ig / igcount) - insertmaxamount) < 0.05 && g[gi].length < g[hi].length)) {
insertmaxamount = ig / igcount;
insertmaxgroupa = gi;
insertmaxgroupb = hi;
}
}
});
}
});
if (insertmaxgroupa > -1 && insertmaxgroupb > -1 && insertmaxamount > 0.5) {
g[insertmaxgroupb].push(g[insertmaxgroupa].shift());
}
// Adjusted to always push downwards so the loop eventually exits
safloor = Math.min(safloor - 0.005, insertmaxamount);
}
//TODO Check that singletons shouldn`t go to the dreg pool (in UM, but no matches with this doc)
// Close up zero member groups
d = g;
g = [];
d.forEach (function (de) {
if (de !== undefined && de.length > 0) {
g.push(de);
}
});
/* // Group: le`old way
d.forEach (function (de, di) {
insertmaxgroup = -1;
insertmaxamount = 0.0;
g.forEach (function (ge, gi) {
igcount = 0;
ig = ge.reduce(function (pv, cv) {
var r = pv, gprankentry;
if (cv[0] !== de[0]) {
gprankentry = da.umGet(de[0], cv[0]);
if (gprankentry.group !== undefined) {
r += gprankentry.group;
igcount++;
}
}
return r;
}, 0.0);
if (igcount > 0 && ig / igcount > insertmaxamount) {
insertmaxamount = ig / igcount;
insertmaxgroup = gi;
}
});
if (insertmaxgroup > -1 && insertmaxamount > 0.6) {
g[insertmaxgroup].push(de);
} else {
if (da.umExists(de[0])) {
g.push([ de ]);
} else {
dregs.push(de);
}
}
});
*/
// Order groups (mean_of (mean_of gprankentry(a.members,b.members).gprank))
// Chrome`s Array.sort() is not stable with 0 return values >.< sadface!
/* d = array_bubble_sort(g, function (ga, gb) {
var r = 0, gpranka = 0.0, gacount = 0, gprank = 0.5;
gpranka = ga.reduce (function (apv, acv) {
var ra = apv, gprankb = 0.0, gbcount = 0;
gprankb = gb.reduce (function (bpv, bcv) {
var rb = bpv, gprankentry = da.umGet(acv[0], bcv[0]);
if (gprankentry.confirmations > 0) {
rb += gprankentry.gprank;
gbcount++;
}
return rb;
}, 0.0);
if (gbcount > 0) {
ra += (gprankb / gbcount);
gacount++;
}
return ra;
}, 0.0);
if (gacount > 0) {
gprank = gpranka / gacount;
if (gprank > 0.5) {
r = -1;
} else if (gprank < 0.5) {
r = 1;
}
}
return r;
}); */
d = orderUsingMatrix(g, function (ga, gb) {
var r = 0, gpranka = 0.0, gacount = 0, gprank = 0.5;
gpranka = ga.reduce (function (apv, acv) {
var ra = apv, gprankb = 0.0, gbcount = 0;
gprankb = gb.reduce (function (bpv, bcv) {
var rb = bpv, gprankentry = da.umGet(acv[0], bcv[0]);
if (gprankentry.confirmations > 0) {
rb += gprankentry.gprank;
gbcount++;
}
return rb;
}, 0.0);
if (gbcount > 0) {
ra += (gprankb / gbcount);
gacount++;
}
return ra;
}, 0.0);
if (gacount > 0) {
gprank = gpranka / gacount;
if (gprank > 0.5) {
r = -1;
} else if (gprank < 0.5) {
r = 1;
}
}
return r;
}, function (g) {
var r = undefined, t;
if (g !== undefined) {
t = g.slice(0);
t.sort(function (a,b) {
return a[0].toLowerCase() < b[0].toLowerCase() ? -1 : 1;
});
r = (t.map(function (i) {
return i[0].toLowerCase();
})).join('*').replace(/[aeiouy]|\s|\./g,'').substring(0,30);
}
return r;
});
g = d;
// Order within groups
d = [];
g.forEach (function (ge, gi) {
/* d[gi] = array_bubble_sort(ge, function (a, b) {
var r = 0, gprank = da.umGet(a[0],b[0]).gprank;
if (gprank > 0) {
if (gprank > 0.5) {
r = -1;
} else if (gprank < 0.5) {
r = 1;
}
}
return r;
}); */
d[gi] = orderUsingMatrix(ge, function (a, b) {
var r = 0, gprank = da.umGet(a[0],b[0]).gprank;
if (gprank > 0) {
if (gprank > 0.5) {
r = -1;
} else if (gprank < 0.5) {
r = 1;
}
}
return r;
}, function (e) {
return e !== undefined ? e[0].toLowerCase() : undefined;
});
});
g = d;
if (dregs.length > 0) {
dregs.sort(function (a, b) {
return a[0].toLowerCase() < b[0].toLowerCase() ? -1 : 1;
});
g.push(dregs);
da.hasdregs = g.length - 1;
} else {
da.hasdregs = -1;
}
return g;
};
da.umSet = function (a, b, gprankentry) {
var t, r;
a = a.toLowerCase();
b = b.toLowerCase();
// Copy the gprankentry
r = {
gprank: gprankentry.gprank,
group: gprankentry.group,
confirmations: gprankentry.confirmations,
};
// Alphabeticise
if (a === b) {
// a and b cannot be the same rule
return { gprank: undefined, group: 1.0, confirmations: -1 };
} else if (a > b) {
t = a;
a = b;
b = t;
// Predicate reversal rule
r.gprank = 1.0 - r.gprank;
}
if (da.um[a] === undefined) {
da.um[a] = { };
}
da.um[a][b] = r;
return gprankentry;
};
da.umGet = function (a, b) {
var t = undefined,
r = { gprank: undefined, group: undefined, confirmations: 0 };
// Alphabeticise
a = a.toLowerCase();
b = b.toLowerCase();
if (a === b) {
// a and b cannot be the same rule
return { gprank: undefined, group: 1.0, confirmations: -1 };
} else if (a > b) {
t = a;
a = b;
b = t;
}
if (da.um[a] !== undefined && da.um[a][b] !== undefined) {
//r = da.um[a][b];
r.gprank = da.um[a][b].gprank;
r.group = da.um[a][b].group;
r.confirmations = da.um[a][b].confirmations;
if (t !== undefined) {
// Predicate reversal rule (group and confirmation remain the same
r.gprank = 1.0 - r.gprank;
}
}
return r;
};
da.umExists = function (a) {
var r = false, t = a.toLowerCase();
if (da.um[t] !== undefined) {
r = true;
} else {
for (var k in da.um) {
if (da.um[k][t] !== undefined) {
r = true;
break;
}
}
}
return r;
};
//Return the module
return da;
}());