var table, years, majors, employed;
var year_compsc = new Array();
var totalcompsc = new Array();

function preload() {
    table = loadTable('graduates.csv', 'csv', 'header');
}

function setup() {
    //count the columns
    createCanvas(1000, 1000);
    majors = table.getColumn('Major');
    total = table.getColumn('Total');
    years = table.getColumn('Year');
    employed = table.getColumn('Employed');
    var j = 0
      , k = 0
      , l = 0
      , m = 0
      , n = 0;
    for (var i = 0; i < table.getRowCount(); i++) {
        if (years[i] > 1998) {
            if (majors[i] == "Computer Science and Math") {
                year_compsc[j] = years[i];
                totalcompsc[j] = total[i];
                //print(totalcompsc[j]);
                j++;
            }
        }

        maxlim = Math.max.apply(null, totalcompsc);
        maxyr = Math.max.apply(null, year_compsc);
        minyr = Math.min.apply(null, year_compsc);

    }

    print(table.getRowCount() + ' total rows in table');
    print(table.getColumnCount() + ' total columns in table');

}

function draw() {
    background(255);

    rect(100, 10, 750, 800);
    scattermatrix(100, 10, 375, 400, year_compsc, year_compsc, minyr, maxyr, 0);
    scattermatrix(850, 810, 380, 405, totalcompsc, totalcompsc, 0, 0, maxlim);

  line(100,400,850,400);
    line(450,10,450,810);
    line(850, 810, 380, 810);
    line(850, 405, 850, 810);
	scattermatrix2(110,405,810,375,year_compsc,totalcompsc,minyr,maxyr,maxlim);
	scattermatrix3(450,10,850,400,year_compsc,totalcompsc,minyr,maxyr,maxlim);
//     line(100,405,100,810)
//     line(100,810,375,810)

    line(450,10,850,10)
    line(850,10,850,400);

}

function scattermatrix2(linex, liney, lineydiff, linexdiff, yeard, totald, minyr, maxyr, maxlim) {
	
	var interval = maxlim/10;
	for(var k = 0;k<yeard.length;k++) {
		x1 = Number(yeard[k]);
		posx1 =map(x1,minyr,maxyr+1,linex,linexdiff);
		y1 = Number(totald[k]);
		posy1 = map(y1,0,maxlim+interval,lineydiff,liney);

		ellipse(posx1,posy1,7,7);
	
	}
}

function scattermatrix3(linex, liney, lineydiff, linexdiff, yeard, totald, minyr, maxyr, maxlim) {
	
	var interval = maxlim/10;
	for(var k = 0;k<yeard.length;k++) {
		x1 = Number(yeard[k]);
		posx1 =map(x1,minyr,maxyr+1,15,400);
		y1 = Number(totald[k]);
		posy1 = map(y1,0,maxlim+interval,850,470);

		ellipse(posy1,posx1,7,7);
	
	}
}

function scattermatrix(linex, liney, linexdiff, lineydiff, data1, data2, minyr, maxyr, maxlim) {

    if (maxlim != 0 && minyr == 0) {
        var interval = maxlim / 10;
        for (var k = 0; k < data1.length; k++) {
            x1 = Number(data1[k]);
            posx1 = map(x1, 0, maxlim + interval, 450, 850);
            y1 = Number(data2[k]);
            posy1 = map(y1, 0, maxlim + interval, 435, 810);

            ellipse(posx1, posy1, 7, 7);
        

        }
    } else if (maxlim == 0 && minyr != 0) {
        for (var k = 0; k < data1.length; k++) {
            x1 = Number(data1[k]);
            posx1 = map(x1, minyr, maxyr + 1, linex, linexdiff);
            y1 = Number(data2[k]);
            posy1 = map(y1, minyr, maxyr + 1, lineydiff, liney);
            ellipse(posx1, posy1, 7, 7);

            var sval = map(posy1, 10, 400, maxyr + 1, minyr);

            if (mouseX > posx1 && mouseY > posy1 && mouseX < posx1 + 7 && mouseY < posy1 + 7) {

                text(sval, mouseX + 10, mouseY - 10);
            }

        }
    }

    /*text(0,annox,annoy);
	maxlim =Math.max.apply(null, total);
	maxyr = Math.max.apply(null,year);
	minyr = Math.min.apply(null,year);   
	  
	for(var l =minyr;l<maxyr+1;l=l+4) {
		posy = map(l,minyr,maxyr+1,ymapx,ymapy);
		text(l,annox,posy);
	}
	var interval = maxlim/10;
	maxl = Math.ceil((maxlim+interval)/10000);
	for(var m =0;m<maxlim+interval;m= m+interval) {
		numd = Math.ceil(m/10000);
		posx = map(numd,0,maxl,xmapx,xmapy);
		text(numd,posx,annoy+20);
	}
	text(name,namex,namey);
	text("Count(10 thousands)",namex+60,namey-15);*/
    //line(linex,liney,linex,lineydiff);
    //line(linex,lineydiff,linexdiff,lineydiff);

    /*for(var k = 0;k<year.length;k++) {
		x1 = Number(total[k]);
		numn = Math.ceil(x1/10000);
		posx1 =map(numn,0,maxl,xmapx,xmapy);
		y1 = Number(year[k]);
		posy1 = map(y1,minyr,maxyr+1,ymapx,ymapy);

		var sval = map(posx1,xmapx,xmapy,0,maxl);

		ellipse(posx1,posy1,3,3);

		if(mouseX > posx1 && mouseY > posy1 && mouseX < posx1+3 && mouseY < posy1 + 3) {
			text(sval, mouseX+20, mouseY); 
		}

	}*/
}