I am using a google chart where x axis data column type is date. But i want
the x axis to be discrete. Is there any way to accomplish this.
When I changed the 'type' option of the axis to be 'category' then i am
unable to see trendlines
here is my code
google.load('visualization', '1.1', {packages: ['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var revenueChart_93;
var data = new google.visualization.DataTable();
data.addColumn('date', 'Month');
data.addColumn('number', 'Predicted Grade');
data.addColumn('number', 'Working Grade');
data.addColumn('number', 'Estimated Grade');
data.addRow([new Date(2015, 2, 12), 1.0, 1.0, 1.0 ]);
data.addRow([new Date(2015, 5, 12), 4.5, 5.0, 6.5]);
data.addRow([new Date(2015, 6, 1), 5.0, 6.0, 4.5]);
data.addRow([new Date(2015, 11, 1), 6.5, 7.0, 5.0]);
var formatter = new google.visualization.NumberFormat({
fractionDigits: 2,
});
formatter.format(data, 1);
var dateFormatter = new google.visualization.NumberFormat({
pattern: 'yyyy MMM'
});
dateFormatter.format(data, 0);
var chartHeight = 550;
var chartWidth = 750;
var chartOptions = {
trendlines: {
1: {
color: 'yellow',
//tooltip: false
}
},
title: 'Progress Report',
isStacked: true,
width: chartWidth,
height: chartHeight,
hAxis: {
title: 'Year',
slantedText: true,
slantedTextAngle: 45,
textStyle: {
fontSize: 10
},
format: 'MMM yyyy',
},
vAxis:{title: "Grade",
minValue: 1,
maxValue: 10,
gridlines: {
count: 19
},
baselineColor: 'none',
},
series: {
2: { lineDashStyle: [2, 2] },
},
legend: { position: 'right', alignment: 'start' },
};
revenueChart_93 = new
google.visualization.LineChart(document.getElementById('progress'));
revenueChart_93.draw(data, chartOptions);
}
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