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simplest_chart_with_axes.html
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<!-- ############################################################################################################################## -->
<!-- # John Wiley & Sons, Inc. # -->
<!-- # # -->
<!-- # Book: Algorithms in Bioinformatics: Theory and Implementation # -->
<!-- # Author: Dr. Paul A. Gagniuc # -->
<!-- # # -->
<!-- # Institution: # -->
<!-- # University Politehnica of Bucharest # -->
<!-- # Faculty of Engineering in Foreign Languages # -->
<!-- # Department of Engineering in Foreign Languages # -->
<!-- # # -->
<!-- # Area: European Union # -->
<!-- # Date: 04/01/2021 # -->
<!-- # # -->
<!-- # Mode: Native JavaScript # -->
<!-- # # -->
<!-- # Cite this work as: # -->
<!-- # Paul A. Gagniuc. Algorithms in Bioinformatics: Theory and Implementation. John Wiley & Sons, 2021, ISBN: 9781119697961. # -->
<!-- # # -->
<!-- ############################################################################################################################## -->
<canvas id="bio" height="300" width="1100"></canvas>
<script>
var signal = "1,0.99,0.96,0.91,0.84,0.76,0.66,0.55,0.42,0.29,0.15,0.01,0.13,0.27,0.4,0.53,0.64,0.74,0.83,0.9,0.95,0.99,1,0.99,0.97,0.92,0.86,0.78,0.68,0.57,0.45,0.32,0.18,0.04,0.1,0.24,0.38,0.5,0.62,0.72,0.81,0.89,0.94,0.98,1,1,0.97,0.93,0.87,0.79,0.7,0.59,0.47,0.34,0.21,0.07,0.08,0.22,0.35,0.48,0.6,0.71,0.8,0.88,0.93,0.98,1,1,0.98,0.94,0.88,0.81,0.72,0.61,0.49,0.37,0.23,0.09,0.05,0.19,0.33,0.46,0.58,0.69,0.78,0.86,0.93,0.97,0.99,1,0.98,0.95,0.9,0.82,0.74,0.63,0.52,0.39,0.26,0.12,0.02,0.16,0.3,0.43,0.56,0.67,0.77,0.85,0.91,0.96,0.99,1,0.99,0.96,0.91,0.84,0.75,0.65,0.54,0.42,0.28";
Chart(signal, '#ff0000', 'y');
// Chart
function Chart(q,c,e) {
var s = q.split(",");
var mx = Math.max.apply(null, s);
var canvas = document.getElementById('bio');
var w = canvas.width;
var h = canvas.height;
if (canvas.getContext) {
var ctx = canvas.getContext('2d');
if(e=='y'){ctx.clearRect(0, 0, w, h);}
ctx.moveTo(0, 0);
ctx.beginPath();
var d = ((w-80)/s.length);
for (var i=0; i<=s.length-1; i++)
{
var y = h - 15 - (((h-15) / mx) * s[i]);
var x = d * i;
ctx.lineTo(x, y+1);
}
ctx.lineWidth = 2;
ctx.strokeStyle = c;
ctx.stroke();
if(s.length>=2 && s.length<=(w-80) && e=='y'){
ctx.closePath();
ctx.beginPath();
//horisontal divisions
ctx.strokeStyle = '#454545';
//distance between divisions must be visible
if((w/s.length)>=5){
for (var i=0; i<s.length; i++)
{
ctx.moveTo(Math.floor(d*i), h-10);
ctx.lineTo(Math.floor(d*i), h);
}
ctx.stroke();
}
//bottom line
ctx.moveTo(0, h-1);
ctx.lineTo(w-80, h-1);
ctx.stroke();
//left vertical line
ctx.moveTo((w-80), 0);
ctx.lineTo((w-80), h);
ctx.stroke();
//top axis
ctx.moveTo((w-80), 1);
ctx.lineTo((w-50), 1);
ctx.stroke();
//top left vertical line
ctx.moveTo((w-55), 0);
ctx.lineTo((w-55), 14);
ctx.stroke();
//bottom axis
ctx.moveTo((w-80), h-15);
ctx.lineTo((w-70), h-15);
ctx.stroke();
//MAX value on chart
text = mx;
dim = ctx.measureText(text).width
ctx.save();
ctx.translate((w-80)+18,18);
ctx.rotate(Math.PI / 2);
ctx.font = "18px Arial";
ctx.fillStyle = "#000000";
ctx.textAlign = "left";
ctx.fillText(text, 0, 0);
ctx.restore();
//MAX text
text = 'MAX';
dim = ctx.measureText(text).width
ctx.save();
ctx.translate((w-65)+20,14);
ctx.font = "18px Arial";
ctx.fillStyle = "#000000";
ctx.textAlign = "left";
ctx.fillText(text, 0, 0);
ctx.restore();
//text = mn;
text = '0';
dim = ctx.measureText(text).width
ctx.save();
ctx.translate((w-80)+20,h-10);
ctx.font = "18px Arial";
ctx.fillStyle = "#000000";
ctx.textAlign = "left";
ctx.fillText(text, 0, 0);
ctx.restore();
}
}
}
</script>