我正在努力与谷歌图表。我希望条从底部而不是从顶部显示。目前,它们正在“悬挂”,如下图所示:
我没有在docs中看到正确的设置,如果存在,请更正我。这是负责处理显示的代码:
function parseInterval(value) {
var result = new Date(1,1,1);
result.setMilliseconds(value*1000);
return result;
}
(function($) {
$(document).ready(function(){
var loading = $('#loading');
$.getJSON("/api/v1/users", function(result) {
var dropdown = $("#user_id");
$.each(result, function(item) {
dropdown.append($("<option />").val(this.user_id).text(this.name));
});
dropdown.show();
loading.hide();
});
$('#user_id').change(function(){
var selected_user = $("#user_id").val();
var chart_div = $('#chart_div');
if(selected_user) {
loading.show();
chart_div.hide();
$.getJSON("/api/v1/mean_time_month/"+selected_user, function(result) {
$.each(result, function(index, value) {
value[1] = parseInterval(value[1]);
});
var data = new google.visualization.DataTable();
data.addColumn('string', 'Month');
data.addColumn('datetime', 'Mean time (h:m:s)');
data.addRows(result);
var options = {
hAxis: {
title: 'Month'
},
vAxis: {
title: 'Mean presence time',
minValue: new Date(1, 1, 1, 0, 0)
},
};
var formatter = new google.visualization.DateFormat({pattern: 'HH:mm:ss'});
formatter.format(data, 1);
chart_div.show();
loading.hide();
var chart = new google.visualization.ColumnChart(chart_div[0]);
chart.draw(data, options);
});
}
});
});
})(jQuery);
最佳答案
尝试使用选项vAxis.direction
...
沿垂直轴的值增长的方向。指定-1以反转值的顺序。
vAxis: {
direction: -1
}
请参阅以下工作片段...
google.charts.load('current', {
callback: drawChart,
packages:['corechart']
});
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Month');
data.addColumn('datetime', 'Mean time (h:m:s)');
data.addRows([
['Jan', new Date(1, 1, 1, 8, 16, 13)],
['Feb', new Date(1, 1, 1, 9, 24, 45)],
['Mar', new Date(1, 1, 1, 7, 36, 56)],
['Apr', new Date(1, 1, 1, 4, 20, 42)],
['May', new Date(1, 1, 1, 6, 51, 16)]
]);
var options = {
hAxis: {
title: 'Month'
},
vAxis: {
direction: -1,
title: 'Mean presence time',
minValue: new Date(1, 1, 1, 0, 0)
}
};
var formatter = new google.visualization.DateFormat({pattern: 'HH:mm:ss'});
formatter.format(data, 1);
var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>
但我认为真正的问题在于数据
注意上例中图表显示的y轴值,
顺序和范围(上午10点至上午12点)似乎不正确
看来您只对时间值感兴趣
因此,建议使用
'timeofday'
与'datetime'
(请参阅-> working with timeofday)
DataTable
'timeofday'
列数据类型采用3或4个数字组成的数组,分别表示小时,分钟,秒和可选的毫秒。使用timeofday与使用date和datetime不同,因为值不是特定于日期的,而date和datetime始终指定日期。例如,时间8:30 am将是:
[8, 30, 0, 0]
,第4个值是可选的([8, 30, 0]
将输出相同的'timeofday'
值)。请参阅以下工作片段,例如使用
'timeofday'
...google.charts.load('current', {
callback: drawChart,
packages:['corechart']
});
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Month');
data.addColumn('timeofday', 'Mean time (h:m:s)');
data.addRows([
['Jan', [8, 16, 13]],
['Feb', [9, 24, 45]],
['Mar', [7, 36, 56]],
['Apr', [4, 20, 42]],
['May', [6, 51, 16]]
]);
var options = {
hAxis: {
title: 'Month'
},
vAxis: {
title: 'Mean presence time',
minValue: [0, 0, 0]
}
};
var formatter = new google.visualization.DateFormat({pattern: 'HH:mm:ss'});
formatter.format(data, 1);
var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>