Hi friends, I have a graph that works perfectly for me, but I have no idea
how to remove the message "Data column (s) for axis # 0 cannot be of type
string". This message shows it when there is no data, it is a dynamic graph
and sometimes it will not have data, so I want to remove that message. I
would appreciate your help.
this is my graph.
<script type="text/javascript">
google.charts.load("current", {packages:["corechart"]});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Nombre de evento', 'Cantidad de asistentes',{ role: "style" } ],
@foreach ($datasis as $datasistencia)
["{{$datasistencia->Nombre}}", {{ $datasistencia->number}},
"#038579"],
@endforeach
]);
var view = new google.visualization.DataView(data);
view.setColumns([0, 1,
{ calc: "stringify",
sourceColumn: 1,
type: "string",
role: "annotation" },
2]);
var options = {
title: "Registro de usuarios que asistirián a los eventos",
bar: {groupWidth: "75%"},
legend: { position: "none" },
};
var chart = new
google.visualization.BarChart(document.getElementById("barchart_valuesistencia"));
chart.draw(view, options);
}
</script>
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