I am having trouble with loading a Histogram into a div on my html. My code
takes some text and makes an array that contains the frequency of each
letter in the text.
This would be the array when the default text is entered. I am not sure if
it is in correct format for google charts.
var frequency = { A : 25, B : 25, C : 25, D : 50, E : 100, F : 25, G : 25,
H : 50, I : 25, J : 25, K : 25, L : 25, M : 25, N : 25, O : 100, P : 25, Q
: 25, R : 50, S : 25, T : 50, U : 50, V : 25, W : 25, X : 25, Y : 25, Z :
25};
My code for generating the Chart is within a function. The function call
occurs when a button is clicked.
<script language = "JavaScript">
function createImageChart(){
var frequency = createfrequency();
google.load('visualization', '1', {'packages':['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable(frequency);
var data = new google.visualization.DataTable();
var options = {
title: 'The Frequency table',
legend: { position: 'none' },
};
var chart = new
google.visualization.Histogram(document.getElementById('chart_div'));
chart.draw(data, options);
}
}
</script>
When it runs I receive a blank page. I have read from online that
google.load uses a document.write.
What should change so that the chart appears in a div on the html page?
Should I display the chart by using
"document.getElementById("showImage").innerHTML = chart.draw(data,
options);" ?
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