I am currently implementing a bar chart using d3 in Angular to represent feelings ranging from very bad (1) to very good (5), with the feelings as labels on the yAxis. However, I am encountering an error message:
Argument of type '(d: any, i: any) => any' is not assignable to parameter of type 'string'.tickFormat(function(d:any,i:any): any { return tickLabels[i] }) ;interface Datum {
created_at: string,
description: 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);
}
I have been referencing Mike Bostock's Let's Make A Bar Chart tutorial and several stack overflow discussions regarding d3 in Angular.
D3.JS change text in axis ticks to custom strings