I am using data points which all have the same date for the column [1] and
I would like the line chart to spread out the points for the duplicate
dates instead of showing one straight line on the line chart.
I have also added a dateFormatter which converts the date to string and
then aims to show them on the x-axis as discretely. However, I am little
unsure, why is this not impacting the result.
Here is my current code:
function drawVisualization(dataValues, chartTitle, columnNames,
categoryCaption) {
if (dataValues.length < 1)
return;
var data = new google.visualization.DataTable();
data.addColumn('string', columnNames.split(',')[0]);
data.addColumn('number', columnNames.split(',')[1]);
data.addColumn('string', columnNames.split(',')[2]);
data.addColumn('datetime', columnNames.split(',')[3]);
for (var i = 0; i < dataValues.length; i++) {
var date = new Date(parseInt(dataValues[i].Date.substr(6),
10));
data.addRow([dataValues[i].ColumnName, dataValues[i].Value,
dataValues[i].Type, date]);
}
var line = new google.visualization.ChartWrapper({
'chartType': 'LineChart',
'containerId': 'PieChartContainer',
'options': {
'width': 950,
'height': 450,
'legend': 'right',
'hAxis': {
'format': "dd-MM-yyyy",
'hAxis.maxValue': 'viewWindow.max',
'maxValue': new Date(2014, 05, 30), 'minValue': new
Date(2014, 04, 05),
'viewWindow': { 'max': new Date(2014, 05, 30) },
},
'title': chartTitle,
'chartArea': { 'left': 100, 'top': 100, 'right': 0,
'bottom': 100 },
'tooltip': { isHtml: true }
},
'view': {
'columns': [3, 1, {
type: 'string',
role: 'tooltip',
calc: function (dt, row) {
return 'Name: ' + dt.getValue(row, 0) + ',
Decimal Price: ' + +dt.getValue(row, 1) + ', Date: ' +
+dt.getFormattedValue(row, 3);
}
}]
}
});
var dateFormatter = new google.visualization.DateFormat({
pattern: 'dd MM yyyy' });
var view = new google.visualization.DataView(data);
view.setColumns([{
type: 'string',
label: data.getColumnLabel(3),
calc: function (dt, row) {
var date = new Date(parseInt(dt.getValue(row, 3)));
return dateFormatter.formatValue(date);
}
}, 1]);
new
google.visualization.Dashboard(document.getElementById('LineChartExample')).bind([categoryPicker],
[line]).draw(data);
}
Please advice, Many thanks for your time and help.
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