Animated age pyramid
From JSXGraph Wiki
This animation shows data from the 12th coordinated Population Projection from the "Statistisches Bundesamt (destatis)".
How to create this animation
- Download the data from destatis.de
- Save the table which should be displayed as csv file.
- Transform the csv file into a JavaScript file containing a 2 dimensional array:
dataV1W1EJ = [["2009"," ","m"," 40 070 "," 341 "," 350 "," 353 "," 348 ",...," 2 "],
[" "," ","w"," 41 665 "," 323 "," 333 "," 335 "," 329 ",...," 12 "],
[" "," ","i"," 81 735 "," 663 "," 683 "," 688 "," 677 ",...," 13 "],
["2010"," ","m"," 39 987 "," 339 "," 341 "," 350 "," 353 ",...," 2 "],
.
.
.
[" "," ","i"," 64 651 "," 465 "," 470 "," 476 "," 481 ",...," 169 "]];
Every third row labeled by 'i' in the third column will be deleted later on.
- Now read the data
function readFile(dataArr) {
var len = dataArr.length,
i, male, female, y,
data = [];
for (i=len-1;i>=0;i--) {
if (i%3==2) {
dataArr.splice(i,1);
} else {
if (i%3==1) {
female = dataArr[i][3].replace(/ /g,'')*1;
} else if (i%3==0) {
y = dataArr[i][0]*1;
male = dataArr[i][3].replace(/ /g,'')*1;
data.push([y,male,female]);
}
dataArr[i].splice(0,4); // year,'',m/w,no,
}
}
data.reverse();
ages = JXG.Math.transpose(dataArr);
return {matrix:ages, total: data};
};
var stat1 = readFile(dataV1W1EJ);
- Create the filled rectangles (men, women)
brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-850,110,850,-10],axis:false});
createCurves(stat1,brd,'#658cb2','#b23f8c');
The complete JavaScript code
<script type="text/javascript" src="/ajax/ageV1W1EJ.js"></script>
<jsxgraph width="500" height="500">
brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-850,110,850,-20],axis:false});
var slide = brd.create('slider',[[-700,-5],[300,-5],[2009,2009,2060]],{name:'year',snapWidth:1});
function createCurves(stat,brd, c1, c2) {
var i, m = [], w = [],
op = 1,
off = 80,
len = stat.matrix.length;
for (i=0;i<len;i++) {
m[i] = brd.create('curve',[[0],[0]],
{fillColor:c1,strokeColor:c1,
strokeOpacity:op,fillOpacity:op,
strokeWidth:1,
highlightFillColor:'yellow',highlightStrokeColor:'yellow'});
m[i].updateDataArray = (function(xArr, y) { return function() {
this.dataX = [-off,-off-xArr[2*(slide.Value()-slide._smin)]*1,-off-xArr[2*(slide.Value()-slide._smin)]*1,-off,-off];
this.dataY = [y,y,y+1,y+1,y];
}; })(stat.matrix[i], i);
JXG.addEvent(m[i].rendNode, 'mouseover',
(function(g,d){ return function(){
g.highlight(); w[g._number].highlight(); setText(g._number);
};})(m[i]), m[i]);
JXG.addEvent(m[i].rendNode, 'mouseout',
(function(g){ return function(){
g.noHighlight(); w[g._number].noHighlight();
};})(m[i]), m[i]);
m[i].hasPoint = function(){return false;};
m[i]._number = i;
w[i] = brd.create('curve',[[0],[0]],
{fillColor:c2,strokeColor:c2,
strokeWidth:1,
strokeOpacity:op,fillOpacity:op,
highlightFillColor:'yellow',highlightStrokeColor:'yellow'});
w[i].updateDataArray = (function(xArr, y) { return function() {
this.dataX = [off,off+xArr[2*(slide.Value()-slide._smin)+1]*1,off+xArr[2*(slide.Value()-slide._smin)+1]*1,off,off];
this.dataY = [y,y,y+1,y+1,y];
}; } )(stat.matrix[i], i);
JXG.addEvent(w[i].rendNode, 'mouseover',
(function(g,d){ return function(){
g.highlight(); m[g._number].highlight(); setText(g._number);
};})(w[i]), w[i]);
JXG.addEvent(w[i].rendNode, 'mouseout',
(function(g){ return function(){
g.noHighlight(); m[g._number].noHighlight();
};})(w[i]), w[i]);
w[i].hasPoint = function(){return false;};
w[i]._number = i;
}
var t = brd.create('turtle',[],{strokeColor:'#999999', highlightStrokeColor:'#999999'}); t.ht().pu().rt(90);
for (i=0;i<=90;i+=10) {
t.moveTo([-750,i]).penDown().forward(750-off+10).penUp();
t.moveTo([off-10,i]).penDown().forward(750-off+10).penUp();
brd.create('text',[-15,i,i.toFixed(0)]);
}
return [m,w];
};
var stat1 = readFile(dataV1W1EJ);
brd.suspendUpdate();
createCurves(stat1,brd,'#658cb2','#b23f8c');
brd.create('text',[-300,45,'men'],{strokeColor:'white',fontSize:20});
brd.create('text',[200,45,'women'],{strokeColor:'white',fontSize:20});
function setText(n) {
var age = n,
male = ages[n][2*(slide.Value()-slide._smin)]*1,
female = ages[n][2*(slide.Value()-slide._smin)+1]*1;
textout.innerHTML = 'age:'+age+
', born in '+(slide.Value()-age)+
'<br> male:'+male+
', female:'+female+
', together:'+(male+female)+
' (thousand)<br> ratio w/m:'+(female/male).toFixed(2);
};
function setTextYear() {
var n = slide.Value()-slide._smin,
data = stat1.total;
textout2.innerHTML = 'Year:'+data[n][0]+
'<br> male:'+data[n][1]+
', female:'+data[n][2]+
', together:'+(data[n][1]+data[n][2])+
' (million)<br> ratio w/m:'+(data[n][2]/data[n][1]).toFixed(3);
};
var animate = null;
function sliderAnimation() {
var s = slide._smin,
e = slide._smax,
sdiff = e-s,
newval = slide.Value()+2;
slide.position = (newval-s)/sdiff;
if (slide.position>1.0) slide.position = 0.0;
brd.update();
animate = setTimeout(sliderAnimation,500);
};
function player(){
if (!animate) {
document.getElementById('playbutton').value = ' stop animation ';
sliderAnimation();
} else {
document.getElementById('playbutton').value = ' play animation ';
clearTimeout(animate);
animate = null;
}
};
</jsxgraph>
<form><select id="years" onChange="changeYear()"></select>
<input type="button" id="playbutton" value="play" onClick="player();">
</form>
<div id="output2" style="padding:20px; background-color:#bbbbbb; width:500px; font-family:Arial,Helvetica"> </div>
<div id="output" style="padding:20px; background-color:#dddddd; width:500px; font-family:Arial,Helvetica"> </div>
<script type="text/javascript">
var textout = document.getElementById('output');
var textout2 = document.getElementById('output2');
var animate = null;
brd.addHook(setTextYear);
brd.unsuspendUpdate();
</script>
