[英]Unable to display actual chart using Google API in Javascript
I am displaying a chart using Google API and I am getting a chart but it is not displaying that line in the graph, 我正在使用Google API显示图表,但是却没有在图表中显示该线,
This is the code I am trying with, I am using array data for charts, 这是我正在尝试的代码,我正在使用图表的数组数据,
var jsonlength = data.feed.entry.length;
var timestamp = new Array(jsonlength);
var temperature = new Array(jsonlength);
var tempid = new Array(jsonlength);
for (var i = 0; i < jsonlength; i++) {
timestamp[i] = ((data.feed.entry[i].gsx$timestamp.$t));
temperature[i] = ((data.feed.entry[i].gsx$temperaturevalue.$t));
}
google.charts.load('current', {packages: ['corechart', 'line']});
google.charts.setOnLoadCallback(drawBasic);
function drawBasic() {
var data = new google.visualization.DataTable();
data1.addColumn('number', 'X');
data1.addColumn('number', 'X');
for (var i = 0; i < jsonlength; i++) {
console.log(i);
data1.addRows(i,data.feed.entry[i].gsx$temperaturevalue.$t);
//Here I can display all those values, But still not getting the chart, Though I have given proper values, Help me here
console.log(data.feed.entry[i].gsx$temperaturevalue.$t);
}
var options = {
hAxis: {
title: 'Date'
},
vAxis: {
title: 'Temperature'
}
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data1, options);
This is the output I am getting without a line, Please help me I am new to this 这是我一直没有得到的输出,请帮助我,我是新手
most likely is due to 'string'
values vs. number
最可能是由于'string'
值与number
try this... 尝试这个...
temperature[i] = (parseFloat(data.feed.entry[i].gsx$temperaturevalue.$t));
here... 这里...
for (var i = 0; i < jsonlength; i++) {
timestamp[i] = ((data.feed.entry[i].gsx$timestamp.$t));
temperature[i] = (parseFloat(data.feed.entry[i].gsx$temperaturevalue.$t));
}
EDIT 编辑
here, you create data
在这里,您创建data
var data = new google.visualization.DataTable();
but then you're adding columns to data1
??? 但是然后您将列添加到data1
?
data1.addColumn('number', 'X');
data1.addColumn('number', 'X');
try syncing up the variable names and check addRow
below... 尝试同步变量名称并在下面检查addRow
...
var data1 = new google.visualization.DataTable();
data1.addColumn('number', 'X');
data1.addColumn('number', 'X');
for (var i = 0; i < jsonlength; i++) {
// use addRow -- which takes an array
data1.addRow([i,data.feed.entry[i].gsx$temperaturevalue.$t]);
}
var options = {
hAxis: {
title: 'Date'
},
vAxis: {
title: 'Temperature'
}
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data1, options);
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