Function cache

src/traces/indicator/plot.js:867–876

(trace, name, initialValue, value, key, fn)

}

function cache(trace, name, initialValue, value, key, fn) {
    var objName = '_cache' + name;
    if(!(trace[objName] && trace[objName].key === key)) {
        trace[objName] = {key: key, value: initialValue};
    }
    var v = Lib.aggNums(fn, null, [trace[objName].value, value], 2);
    trace[objName].value = v;

    return v;
}