How to use dates in X-axis with Google chart API?

Question

Is there a way to plot a chart with Google chart API so that the X-axis values are days in a month?

I have data points that are not provided with the same frequency. For

Answer 1

I had the same problem, found scatter plots on Google Charts, it does exactly what is necessary.

Here's the code I ended up with (took theirs as a starting point):

function drawVisualization() {
    // Create and populate the data table.
    var data = new google.visualization.DataTable();
    data.addColumn('date', 'Date');
    data.addColumn('number', 'Quantity');
    data.addRow([new Date(2011, 0, 1), 10])
    data.addRow([new Date(2011, 1, 1), 15])
    data.addRow([new Date(2011, 3, 1), 40])
    data.addRow([new Date(2011, 6, 1), 50])


    // Create and draw the visualization.
    var chart = new google.visualization.ScatterChart(
        document.getElementById('visualization'));
    chart.draw(data, {title: 'Test',
                      width: 600, height: 400,
                      vAxis: {title: "cr", titleTextStyle: {color: "green"}},
                      hAxis: {title: "time", titleTextStyle: {color: "green"}},
                      lineWidth: 1}
              );
}

Note that they seem to count months from 0, i.e. January is 0, February is 1, ..., December is 11.