rename file into single-feature.js

Author: FarrelAD

src/single-feature.js

@@ -0,0 +1,157 @@
+/**
+ * Hasil pengamatan data:
+ * - Data yang didapat berupa klasemen sederhana liga Inggris
+ * - Kolom pertama berisi rangking tim
+ * - Kolom kedua total gol dalam semusim
+ * - Kolom ketiga berisi point yang didapat
+ */
+
+/**
+ * TANTANGAN!
+ * 
+ * 1. Tentukan prediksi total gol berdasarkan jumlah shot on target
+ *    yang diketahui
+ * 2. 
+ */
+
+
+
+///////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////
+
+
+
+import fs from 'fs'
+import csv from 'csv-parser'
+import Table from 'cli-table3'
+
+
+const standingsTable = new Table({
+    head: ['Pos', 'Club', 'Played', 'Won', 'Draw', 'Lost', 'Points']
+})
+
+const goalShotOnTargetTable = new Table({
+    head: ['Pos', 'Club', 'Played', 'Goals', 'Shot on target']
+})
+
+
+const readFileAsync = (tableObj, filePath, textPreview) => {
+    return new Promise((resolve, reject) => {
+        fs.createReadStream(filePath)
+            .pipe(csv())
+            .on('data', (row) => tableObj.push(Object.values(row)))
+            .on('end', () => {
+                console.log(`\n\n${textPreview}`)
+                console.log(tableObj.toString())
+                resolve()
+            })
+            .on('error', (error) => reject(error))
+    })
+}
+
+
+try {
+    await Promise.all([
+        readFileAsync(standingsTable, 'data/standings.csv', 'Klasemen Liga Inggris 2024/2025 Minggu ke-20'),
+        readFileAsync(goalShotOnTargetTable, 'data/goals_shot_on_target.csv', 'Tabel Gol dan Shot On Target Liga Inggris Minggu ke-20')
+    ])
+} catch (error) {
+    console.error('Error read file: ', error)
+}
+
+
+
+/**
+ * Menghitung total goal dan shot on target selama 20 minggu terakhir
+ * 
+ * - Diketahui data goal berada di indeks ke-3
+ * - Diketahui data shot on target berada di indeks ke-4
+ */
+
+const totalGoal = goalShotOnTargetTable.reduce((sum, val) => sum + parseInt(val[3]), 0)
+const totalShotOnTarget = goalShotOnTargetTable.reduce((sum, val) => sum + parseInt(val[4]), 0)
+
+console.log('\nTotal Gol: ', totalGoal)
+console.log('Total shot on target: ', totalShotOnTarget)
+
+
+
+/**
+ * Menghitung nilai kuadrat dari total shot on target
+ */
+
+const squareTotalShotOnTarget = goalShotOnTargetTable.reduce((sum, val) => {
+    return sum + val[4] ** 2
+}, 0)
+
+console.log('Total data shot on target kuadrat: ', squareTotalShotOnTarget)
+
+
+/**
+ * Menghitung nilai total dari goal kali shot on target
+ */
+const totalGoalTimesShotOnTarget = goalShotOnTargetTable.reduce((sum, val) => {
+    return sum + parseInt(val[3]) * parseInt(val[4])
+}, 0)
+
+console.log('Total data jumlah gol kali shot on target: ', totalGoalTimesShotOnTarget)
+
+
+
+/**
+ * Menghitung nilai total dari seluruh goal dengan seluruh shot on target
+ */
+const totalAllGoalTimesShotOnTarget = totalGoal * totalShotOnTarget
+
+console.log('Total seluruh goal kali shot on target: ', totalAllGoalTimesShotOnTarget)
+
+/**
+ * Menentukan nilai b
+ */
+
+const totalData = goalShotOnTargetTable.length
+console.log('Panjang data: ', totalData)
+
+const b = (
+    ((totalData * totalGoalTimesShotOnTarget) - totalAllGoalTimesShotOnTarget) /
+    ((totalData * squareTotalShotOnTarget) - (totalShotOnTarget ** 2))
+)
+
+console.log('\nNilai b: ', b)
+
+
+/**
+ * Menentukan nilai a
+ */
+
+const a = (totalGoal / totalData) - (b * (totalShotOnTarget / totalData))
+
+console.log('Nilai a: ', a)
+
+
+
+/**
+ * Menentukan persamaan
+ * 
+ * Persamaan dasar: f(x) = a + bx
+ * x : nilai shot on target yang diketahui
+ */
+
+const fx = (x) => a + (b * x)
+
+// Versi teks
+console.log(`\nDidapatkan persamaan: ${a} + ${b}x`)
+
+/**
+ * Percobaan pengujian
+ * 
+ * Menentukan perkiraan jumlah goal berdasarkan jumlah shot on target
+ * - Jika shot on target berjumlah 130
+ * - Jika shot on target berjumlah 234
+ * - Jika shot on target berjumlah 87
+ */
+
+console.log('\nTotal goal jika shot on target 130: ', fx(130))
+console.log('Total goal jika shot on target 234: ', fx(234))
+console.log('Total goal jika shot on target 87: ', fx(87))