Bar chart in D3.js with AngularJS - angularjs

Question

I have an error in d3 bar chart, when load on the web page
the error :
Error: Invalid value for <rect> attribute y="NaN" , Error: Invalid value for <rect> attribute height="NaN"
I tried to solve it by edit this code
nothing worked
var countriesData = data.countries;
var datac=[];
for (var key in countriesData) {
datac.push({key: key, value: countriesData[key]});
};
console.log(datac);
var width = 250;
var height = 250;
//console.log(data4);
//x and y Scales
var xScale = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var yScale = d3.scale.linear()
.range([height, 0]);
xScale.domain(datac.map(function(d) { return d.x; }));
yScale.domain([0, d3.max(datac, function(d) { return d.y; })]);
//x and y Axes
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom");
//.ticks();
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left");
//.ticks(function(d) { return d.x; });
//create svg container
var svg = d3.select("#barchart").select("svg").remove();
svg = d3.select("#barchart")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
//.transition().duration(2000)
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
//create bars
svg.selectAll(".bar")
.data(datac)
.enter()
.append("rect")
.attr("class", "bar")
.attr("x", function(d) { return xScale(d.x); })
.attr("width", xScale.rangeBand())
.attr("y", function(d) { return yScale(d.y); })
.attr("height", function(d) { return height - yScale(d.y); });
//drawing the x axis on svg
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
//drawing the y axis on svg
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Reviews Number");
Please help!

Answer 1

Hard to say, but I'm guessing its the definition of the xScale:
xScale.domain(datac.map(function(d) { return d.x; }));
probably should be something like:
xScale.domain(d3.extent(datac, fucntion (d) {return d.x}))