Question

我正在角度使用d3创建一个从非常糟糕（1）到非常好（5）的情感条形图，感觉作为yAxis上的标签。我遇到了一个错误：Argument of type '(d: any, i: any) => any' is not assignable to parameter of type 'string'。我已经能够使用“any”来解决类似的类型错误，但它在这部分中不起作用：.tickFormat(function(d:any,i:any): any { return tickLabels[i] }) ;

interface Datum {
    created_at: string,
    decription: string,
    feeling: string,
    feeling_attachments: any,
    feeling_in_number: number,
    id: number,
    tag_user_ids: string,
    tags: any,
    visibility: string
}

buildChart2(feels: Array<Datum>){
    var feelsData = feels.reverse()
    var margin = {top: 20, right: 30, bottom: 30, left: 40},
width = 800 - margin.left - margin.right,
height = 250 - margin.top - margin.bottom;

var ticks = [0,1,2,3,4,5];
    var tickLabels = ['','very bad','bad','neutral','good','very good']

var x = d3.scale.ordinal()
      .rangeRoundBands([0, width], 0);

    var y = d3.scale.linear()
      .range([height, 0]);

    var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

  var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .tickValues(ticks)
    .tickFormat(function(d:any,i:any): any { return tickLabels[i] }) ;

    var chart = d3.select(".feelsChart")
        .attr("width", width + margin.left + margin.right)
        .attr("height", height + margin.top + margin.bottom)
    .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");


  y.domain([0, d3.max(feelsData, function(d: any): any { return d.feeling_in_number; })]);

  var barWidth = width / feelsData.length;

  var bar = chart.selectAll("g")
      .data(feelsData)
    .enter().append("g")
      .attr("transform", function(d, i) { return "translate(" + i * barWidth + ",0)"; });

  bar.append("rect")
  .attr("y", function(d) { return y(d.feeling_in_number); })
  .attr("height", function(d) { return height - y(d.feeling_in_number); })
  .attr("width", barWidth - 1);

  bar.append("text")
  .attr("x", barWidth / 2)
  .attr("y", function(d) { return y(d.feeling_in_number) + 3; })
  .attr("dy", ".75em");
  // .text(function(d) { return d.feeling_in_number; });

  chart.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("Frequency");

    chart.append("g")
    .attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);
}

我一直试图解决Mike Bostock的Let's Make A Bar Chart教程以及其他一些有关角度d3的堆栈溢出问题。

D3.JS change text in axis ticks to custom strings

Answer 1

看起来您正在尝试遵循一些使用旧版式声明函数的javascript指南。 Typescript使用带有箭头功能的较新的ES6语法。所以函数应该在typescript中写成：

.tickFormat((d:any, i:any): any => return tickLabels[i]);

您可以阅读有关打字稿here

中的函数的更多信息

如何使用角度为d3的自定义字符串标签创建条形图？

1 个答案: