I get this error: "svg.append(...).attr(...).attr(...).call(...).tickFormat is not a function
var x = d3.scaleLinear().domain([0, data.length]).range([0, width]);
var y = d3.scaleLinear().domain([-1, 1]).range([height, 5]);
// Add the X Axis
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + y(0) + ")")
.call(d3.axisBottom(x))
.ticks(20)
.tickFormat(d3.format(".0s"))
I want to put all the value of x axis to integer.