dc.js - pieChart ignore unwanted values - dc.js

Question

I have a piechart I'm displaying using the following dimension -
var types = facts.dimension(function (d) {
if (d.types === 2)
return "Type 2";
else if (d.types === 3)
return "Type 3";
else
return "Other";
});
I would like to not return, ignore, all other types, so the pie chart would just display Type 2 and Type 3. I cannot seem to get this working though I'm sure it's simple. Can I do something within that dimension or do I need to filter before?
Thanks for any help.

Answer 1

Have you tried creating a new type and then creating a dimension on top of that?
facts.forEach(function(d) {
if (d.types == 2) {
d._type = "Type 2";
} else if (d.types == 3) {
d._type = "Type 3";
} else {
d._type = "Other";
}
});
var types = facts.dimension(dc.pluck('_type'))

Answer 2

You need to (1) Filter your data then (2) remove it from the bin. Run your data through ensure_group_bins(myGroup) you'll get the chart you're after
function remove_empty_bins(source_group) {
return {
all:function () {
return source_group.all().filter(function(d) {
return d.key != "unwanted" ;
});
}
};}
function ensure_group_bins(source_group, bins) {
return {
all:function () {
var result = source_group.all().slice(0), // copy original results (we mustn't modify them)
found = {};
result.forEach(function(d) {
found[d.key] = true;
});
bins.forEach(function(d) {
if(!found[d])
result.push({key: d, value: 0});
});
return result;
}
};};
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