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update_scripts/make_variance_from_geojson.ts
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88
update_scripts/make_variance_from_geojson.ts
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/**
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prendre un CSV,
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examiner toutes les colonnes et leurs valeurs,
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garder en mémoire les valeurs uniques de chaque colonne
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faire un nouveau csv qui ne montre que les valeurs uniques pour chacune des colonnes
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et qui compte le nombre de valeurs
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**/
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import utils from '../mappings/utils'
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import {parse} from 'csv'
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const fs = require('fs')
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const minimist = require('minimist')
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interface VarianceType {
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[key: string]: Array<string>
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}
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let csv_content = 'variance de dataset\n';
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let separator = ';';
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// let columns_headings = [];
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let data_variance: VarianceType = {};
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const inputPath = '../etalab_data/arbres/arbres_ech.json'
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// const inputPath = './etalab_data/small.csv'
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let columns_headings: Array<string> = [];
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let lines_count = 0;
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let longest_variance_count = 0;
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console.log('open file ', inputPath)
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fs.readFile(inputPath, function (err: any, fileData: any) {
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if (err) {
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throw new Error(err)
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} else {
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parse(fileData, {columns: false, trim: true}, function (err: any, rows: any) {
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if(err){
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throw new Error(err)
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}
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console.log('line ', lines_count)
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console.log('rows', rows)
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console.log('longest_variance_count', longest_variance_count)
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})
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}
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console.log('parsing done')
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})
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/**
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* écrit un csv avec les données de variance du dataset donné
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*/
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function writeCSVVariance() {
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let csv_content = ';variance de ' + inputPath + ';' + new Date() + '\n'
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let columns = Object.keys(data_variance);
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// add headings
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columns_headings.forEach((heading: string) => {
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csv_content = csv_content + separator + heading
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})
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csv_content = csv_content + '\n'
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// add max length of variance for each column
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let ii = 0
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columns.forEach((column: string) => {
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// console.log('column', column, data_variance[column].length)
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csv_content = csv_content + separator + data_variance[column].length
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ii++
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})
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csv_content = csv_content + '\n\n'
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// add content of values
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for (let ii = 0; ii < longest_variance_count; ii++) {
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csv_content = csv_content + '\n'
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columns.forEach((column: any) => {
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if (ii < data_variance[column].length) {
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let currentValue = data_variance[column][ii]
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csv_content = csv_content + separator + currentValue
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} else {
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csv_content = csv_content + separator
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}
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})
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}
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return csv_content;
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}
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