d3.js:d3.min.js:1错误:属性d:预期编号,“MNaN,NaNLNaN,NaN”
问题描述:
我导入了一个csv文件并试图映射d3上的信息。我想我已经适当地扩大了一切。任何人都可以帮我解决这个问题吗?d3.js:d3.min.js:1错误:<path>属性d:预期编号,“MNaN,NaNLNaN,NaN”
我得到以下错误:
d3.min.js:1 Error: <path> attribute d: Expected number, "MNaN,NaNLNaN,NaNL…".
的数据在CSV文件中是这样的:
------------------------------------------
| 00:00:01 | 1 |
------------------------------------------
| 00:05:01 | 2 |
------------------------------------------
| 00:10:01 | 3 |
------------------------------------------
| 00:15:01 | 5 |
------------------------------------------
下面的代码。
var Chart = (function(window,d3) {
var svg, data, x, y, xAxis, yAxis, dim, chartWrapper, line, path, margin = {}, width, height;
d3.csv('Book1.csv', init); //load data, then initialize chart
//called once the data is loaded
function init(csv) {
data = csv;
//initialize scales
xExtent = d3.extent(data, function(d,i) { return new Date(d.date) });
yExtent = d3.extent(data, function(d,i) { return d.value });
x = d3.time.scale().domain(xExtent);
y = d3.scale.linear().domain(yExtent);
//initialize axis
xAxis = d3.svg.axis().orient('bottom');
yAxis = d3.svg.axis().orient('left');
//the path generator for the line chart
line = d3.svg.line()
.x(function(d) { return x(new Date(d.date)) })
.y(function(d) { return y(d.value) });
//initialize svg
svg = d3.select('#chart').append('svg');
chartWrapper = svg.append('g');
path = chartWrapper.append('path').datum(data).classed('line', true);
chartWrapper.append('g').classed('x axis', true);
chartWrapper.append('g').classed('y axis', true);
//render the chart
render();
}
function render() {
//get dimensions based on window size
updateDimensions(window.innerWidth);
//update x and y scales to new dimensions
x.range([0, width]);
y.range([height, 0]);
//update svg elements to new dimensions
svg
.attr('width', width + margin.right + margin.left)
.attr('height', height + margin.top + margin.bottom);
chartWrapper.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
//update the axis and line
xAxis.scale(x);
yAxis.scale(y);
svg.select('.x.axis')
.attr('transform', 'translate(0,' + height + ')')
.call(xAxis);
svg.select('.y.axis')
.call(yAxis);
path.attr('d', line);
}
function updateDimensions(winWidth) {
margin.top = 20;
margin.right = 50;
margin.left = 50;
margin.bottom = 50;
width = winWidth - margin.left - margin.right;
height = 500 - margin.top - margin.bottom;
}
return {
render : render
}
})(window,d3);
答
按照documentation从解析CSV将字符串产生的所有值:
Note that the values themselves are always strings; they will not be automatically converted to numbers.
您必须指定一个访问函数,该函数转换
d3.csv('Book1.csv', convert, init); //load data, convert, then initialize chart
function convert(d) {
return {
date: new Date(d.date),
value: +d.value // convert string to number
};
}
照顾作为一个副作用,这也将简化你的代码,因为它使你不必每次都做一个转换,您访问价值。下面是完整的代码:
var Chart = (function(window, d3) {
var svg, data, x, y, xAxis, yAxis, dim, chartWrapper, line, path, margin = {},
width, height;
d3.csv('Book1.csv', convert, init); //load data, convert, then initialize chart
function convert(d) {
return {
date: new Date(d.date),
value: +d.value // convert string to number
};
}
//called once the data is loaded
function init(csv) {
data = csv;
//initialize scales
xExtent = d3.extent(data, function(d, i) {
return d.date;
});
yExtent = d3.extent(data, function(d, i) {
return d.value;
});
x = d3.time.scale().domain(xExtent);
y = d3.scale.linear().domain(yExtent);
//initialize axis
xAxis = d3.svg.axis().orient('bottom');
yAxis = d3.svg.axis().orient('left');
//the path generator for the line chart
line = d3.svg.line()
.x(function(d) {
return x(d.date)
})
.y(function(d) {
return y(d.value)
});
//initialize svg
svg = d3.select('#chart').append('svg');
chartWrapper = svg.append('g');
path = chartWrapper.append('path').datum(data).classed('line', true);
chartWrapper.append('g').classed('x axis', true);
chartWrapper.append('g').classed('y axis', true);
//render the chart
render();
}
function render() {
//get dimensions based on window size
updateDimensions(window.innerWidth);
//update x and y scales to new dimensions
x.range([0, width]);
y.range([height, 0]);
//update svg elements to new dimensions
svg
.attr('width', width + margin.right + margin.left)
.attr('height', height + margin.top + margin.bottom);
chartWrapper.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
//update the axis and line
xAxis.scale(x);
yAxis.scale(y);
svg.select('.x.axis')
.attr('transform', 'translate(0,' + height + ')')
.call(xAxis);
svg.select('.y.axis')
.call(yAxis);
path.attr('d', line);
}
function updateDimensions(winWidth) {
margin.top = 20;
margin.right = 50;
margin.left = 50;
margin.bottom = 50;
width = winWidth - margin.left - margin.right;
height = 500 - margin.top - margin.bottom;
}
return {
render: render
}
})(window, d3);
答
x.range([0, width]);
y.range([height, 0]);
前应
line = d3.svg.line()
.x(function(d) { return x(new Date(d.date)) })
.y(function(d) { return y(d.value) });
像这样
x = d3.time.scale().domain(xExtent).range([0, width]);
y = d3.scale.linear().domain(yExtent).range([height, 0]);
line = d3.svg.line()
.x(function(d) { return x(new Date(d.date)) })
.y(function(d) { return y(d.value) });
如此看来这部分'线= d3.svg.line() .X(函数(d){返回X(新日期(d.date))}) .y(function(d){return y(d.value)});'不返回d3可以使用的数字。 – Craicerjack
您的CSV不是逗号分隔的? – epascarello