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Compute marks mean
// ==UserScript==
// @name UA Mean
// @namespace http://tampermonkey.net/
// @version 0.3.1
// @description Compute marks mean
// @author Tisila
// @match https://paco.ua.pt/secvirtual/c_planocurr.asp
// @grant none
// ==/UserScript==
var tables = document.getElementsByTagName("table");
var marksTable = tables[37];
var overallTable = tables[43];
var data = loadMarks(marksTable);
var average = mean(data[0], data[1]);
refresh(average);
function loadMarks(table) {
var loadedTable = [];
var marks = [];
var ects = [];
var rows = table.rows;
for (row = 1; row < 41; row++) {
var ect = rows[row].cells[6].innerHTML;
var mark = rows[row].cells[7].innerHTML;
if (mark.length > 3) {
ects.push(parseInt(ect));
marks.push(parseInt(mark));
}
}
loadedTable.push(ects);
loadedTable.push(marks);
return loadedTable;
}
function mean(ects, marks) {
var markSum = 0;
var ectSum = 0;
for (i = 0; i <= marks.length - 1; i++) {
markSum += ects[i] * marks[i];
ectSum += ects[i];
}
var totalMean = markSum / ectSum;
return round(totalMean,2);
}
function refresh(mean) {
var rows = overallTable.rows;
var row = overallTable.insertRow(rows.length);
row.className = 'table_cell_impar';
var cell1 = row.insertCell(0);
var cell2 = row.insertCell(1);
cell1.align = 'left';
cell2.align = 'right';
cell1.innerHTML = "Média ponderada do plano curricular";
cell2.innerHTML = mean;
}
function round(value, decimals) {
return Number(Math.round(value+'e'+decimals)+'e-'+decimals);
}