Strange diagonal line in Google Visualization API -


sometimes strange diagonal line in google line chart. please see below blue volume chart.

it has "closing" line first last value.

any idea how comes?

strange diagonal line

data = new google.visualization.datatable() data.addcolumn('datetime', 'date') data.addcolumn('number', 'volume') data.addcolumn('number', 'connected') tracking in trackings     if(tracking.createdat instanceof date && tracking.volume? && typeof tracking.volume "number")         connected = if(tracking.connected? && tracking.connected) 10000 else -10000         data.addrow([tracking.createdat, tracking.volume, connected]) options = {     title: 'sensor values'     legend:         position: 'bottom'     haxis:         minvalue:         maxvalue:     curvetype: 'function' } chart = new google.visualization.linechart(document.getelementbyid('volumechart')) chart.draw(data, options)

the issue disappears when sort data date.

it appeared when had ca. more 200 unsorted data points on graph.

in meteor / mongodb worked me:

data = sensortracking.find({}, {sort: {createdat: 1}}).fetch()

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