minor gridlines on datetime axis

[Christo]

Hi helpers!

I'm trying to add minor gridlines every hour. on my hAxis , but I can't find any way to do that.

I tried thicks, gridlines count, etc... but I can't find the right parameters...

Could you help me?

thank you

there is my code:

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js">

</script> <script type="text/javascript">

      google.load('visualization', '1', {packages:['corechart']});

      google.charts.setOnLoadCallback(drawChart);

    

      function drawChart() {

      var data = google.visualization.arrayToDataTable([

          ['TIME', 'Room', 'Frogs', 'Orchids'],

['2017-05-09 20:10:02',  55.6,  67.0,  81.9],
['2017-05-09 20:00:11',  55.5,  66.8,  81.6],
['2017-05-09 19:50:02',  55.3,  66.8,  81.1],
['2017-05-09 19:40:02',  54.6,  66.5,  80.3],
['2017-05-09 19:30:02',  54.8,  66.7,  80.3],
['2017-05-09 19:20:02',  54.7,  66.8,  80.3],
['2017-05-09 19:10:02',  54.6,  66.7,  80.2],
['2017-05-09 19:00:02',  54.5,  66.5,  80.1],
['2017-05-09 18:50:02',  54.5,  66.2,  80.0],
['2017-05-09 18:40:02',  54.6,  66.2,  80.0],
['2017-05-09 18:30:02',  54.6,  66.4,  79.8],
['2017-05-09 18:20:02',  54.5,  66.6,  79.6],
['2017-05-09 18:10:02',  54.5,  66.4,  79.6],
['2017-05-09 18:00:02',  54.5,  66.5,  79.6],
['2017-05-09 17:50:02',  54.6,  66.6,  79.5],
['2017-05-09 17:40:02',  54.6,  66.5,  79.4],
['2017-05-09 17:30:02',  54.5,  66.4,  79.2],
['2017-05-09 17:20:02',  54.6,  66.5,  79.3],
['2017-05-09 17:10:02',  54.5,  66.3,  79.1],
['2017-05-09 17:00:01',  54.4,  66.3,  79.1],
['2017-05-09 16:50:02',  54.5,  66.2,  80.0],
['2017-05-09 16:40:02',  54.6,  66.2,  80.0],
['2017-05-09 16:30:02',  54.6,  66.4,  79.8],
['2017-05-09 16:20:02',  54.5,  66.6,  79.6],
['2017-05-09 16:10:02',  54.5,  66.4,  79.6],
['2017-05-09 16:00:02',  54.5,  66.5,  79.6],
['2017-05-09 15:50:02',  54.5,  66.2,  80.0],
['2017-05-09 15:40:02',  54.6,  66.2,  80.0],
['2017-05-09 15:30:02',  54.6,  66.4,  79.8],
['2017-05-09 15:20:02',  54.5,  66.6,  79.6],
['2017-05-09 15:10:02',  54.5,  66.4,  79.6],
['2017-05-09 15:00:02',  54.5,  66.5,  79.6],
['2017-05-09 14:50:02',  54.5,  66.2,  80.0],
['2017-05-09 14:40:02',  54.6,  66.2,  80.0],
['2017-05-09 14:30:02',  54.6,  66.4,  79.8],
['2017-05-09 14:20:02',  54.5,  66.6,  79.6],
['2017-05-09 14:10:02',  54.5,  66.4,  79.6],
['2017-05-09 14:00:02',  54.5,  66.5,  79.6],
['2017-05-09 13:50:02',  54.5,  66.2,  80.0],
['2017-05-09 13:40:02',  54.6,  66.2,  80.0],
['2017-05-09 13:30:02',  54.6,  66.4,  79.8],
['2017-05-09 13:20:02',  54.5,  66.6,  79.6],
['2017-05-09 13:10:02',  54.5,  66.4,  79.6],
['2017-05-09 13:00:02',  54.5,  66.5,  79.6],

var options = {

title: 'Humidity: ALL, LAST HOUR',

curveType: 'function',

        legend: { position: 'bottom' },

series: {

            0: { color: '#808080' },

            1: { color: '#FFA500' },

            2: { color: '#008000' },

},

  backgroundColor:'#e6f2ff',

hAxis: { textPosition: 'none', direction: '-1' },

  vAxis: {gridlines: { count: 11} , minorGridlines: { count: 1},

           viewWindow:{

                                  max:100, min:0

                                 }

              }

};

var chart = new google.visualization.LineChart(document.getElementById('humidity_chart'));

    chart.draw(data, options); }

    </script>

[Daniel LaLiberte]

Hi Christo,

Check the 'units' option, mentioned on this page: https://developers.google.com/chart/interactive/docs/datesandtimes

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Daniel LaLiberte

dlaliberte@Google.com   5CC, Cambridge MA