{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Rainfall" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Το ζητούμενο σε αυτή την άσκηση είναι να βρούμε ένα χρονικό διάστημα κατά το οποίο το συνολικό ύψος βροχόπτωσης σε κάποια δεδομένη τοποθεσία να είναι ίσο με μία επίσης δεδομένη τιμή `s`." ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Ξεκινάμε βρίσκοντας ένα κατάλληλο αρχείο με δεδομένα από μετρήσεις καιρικών φαινομένων για την Ελλάδα. Κάνοντας στη μηχανή αναζήτησης της Google το query `weather greece site:kaggle.com`, το πρώτο αποτέλεσμα με τίτλο `Greek weather data | Kaggle` παραπέμπει σε [αυτή τη σελίδα](https://www.kaggle.com/spirospolitis/greek-weather-data), από την οποία μπορούμε να κατεβάσουμε το αρχείο [greek_weather_data.csv](https://www.kaggle.com/spirospolitis/greek-weather-data/download/fgFv2TKdFbFRQqLKQIcg%2Fversions%2FTGRV5mUmkPL04oIJ5TFw%2Ffiles%2Fgreek_weather_data.csv?datasetVersionNumber=1), μεγέθους 158MB." ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Προκειμένου να διευκολύνουμε αφενός την παρουσίαση στο εργαστήριο, αφετέρου να πειραματιστούμε αρχικά με ένα μικρότερο σύνολο δεδομένων για να βεβαιωθούμε ότι η λύση μας είναι σωστή, περιοριζόμαστε στις πρώτες 1000 γραμμές του παραπάνω αρχείου τις οποίες αντιγράφουμε σε ένα νέο αρχείο `small.csv`. Αυτό μπορούμε να το πετύχουμε εύκολα με την παρακάτω εντολή (σε linux):\n", "```\n", "head -1000 greek_weather_data.csv > small.csv\n", "```" ] }, { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs": [], "source": [ "import numpy as np\n", "import pandas as pd" ] }, { "cell_type": "code", "execution_count": 2, "metadata": {}, "outputs": [], "source": [ "df = pd.read_csv(\"small.csv\")" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Διαβάσαμε το αρχείο με τη συνάρτηση του pandas για ανάγνωση αρχείων CSV." ] }, { "cell_type": "code", "execution_count": 3, "metadata": { "scrolled": true }, "outputs": [ { "data": { "text/html": [ "
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994 | \n", "994\\tΉπειρος\\tΆρτα\\t2009\\t03\\t21\\t8.7\\t12.4\\t1... | \n", "
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0 | \n", "0 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "1 | \n", "14.6 | \n", "21.7 | \n", "15:10:00 | \n", "10.4 | \n", "... | \n", "0.0 | \n", "1.3 | \n", "24.1 | \n", "15:40:00 | \n", "SSE | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
1 | \n", "1 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "2 | \n", "14.3 | \n", "21.6 | \n", "17:40:00 | \n", "6.2 | \n", "... | \n", "0.4 | \n", "2.1 | \n", "22.5 | \n", "14:40:00 | \n", "ENE | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
2 | \n", "2 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "3 | \n", "14.6 | \n", "22.7 | \n", "13:40:00 | \n", "8.4 | \n", "... | \n", "3.6 | \n", "1.8 | \n", "24.1 | \n", "18:20:00 | \n", "ESE | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
3 | \n", "3 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "4 | \n", "17.6 | \n", "26.7 | \n", "15:50:00 | \n", "11.2 | \n", "... | \n", "0.2 | \n", "1.6 | \n", "17.7 | \n", "13:30:00 | \n", "WNW | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
4 | \n", "4 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "5 | \n", "16.7 | \n", "26.3 | \n", "14:10:00 | \n", "10.8 | \n", "... | \n", "1.8 | \n", "2.7 | \n", "20.9 | \n", "10:40:00 | \n", "WNW | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "
994 | \n", "994 | \n", "Ήπειρος | \n", "Άρτα | \n", "2009 | \n", "3 | \n", "21 | \n", "8.7 | \n", "12.4 | \n", "12:50:00 | \n", "6.8 | \n", "... | \n", "33.4 | \n", "6.0 | \n", "35.4 | \n", "06:00:00 | \n", "N | \n", "50.0 | \n", "39° 12' 00\" N | \n", "20° 54' 00\" E | \n", "39.200000 | \n", "20.900000 | \n", "
995 | \n", "995 | \n", "Ήπειρος | \n", "Άρτα | \n", "2009 | \n", "3 | \n", "22 | \n", "7.9 | \n", "12.3 | \n", "13:40:00 | \n", "6.3 | \n", "... | \n", "0.8 | \n", "3.2 | \n", "29.0 | \n", "10:20:00 | \n", "ENE | \n", "50.0 | \n", "39° 12' 00\" N | \n", "20° 54' 00\" E | \n", "39.200000 | \n", "20.900000 | \n", "
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997 | \n", "997 | \n", "Ήπειρος | \n", "Άρτα | \n", "2009 | \n", "3 | \n", "24 | \n", "10.3 | \n", "15.7 | \n", "14:00:00 | \n", "5.1 | \n", "... | \n", "0.0 | \n", "6.3 | \n", "29.0 | \n", "15:20:00 | \n", "ENE | \n", "50.0 | \n", "39° 12' 00\" N | \n", "20° 54' 00\" E | \n", "39.200000 | \n", "20.900000 | \n", "
998 | \n", "998 | \n", "Ήπειρος | \n", "Άρτα | \n", "2009 | \n", "3 | \n", "25 | \n", "10.6 | \n", "14.2 | \n", "09:10:00 | \n", "7.3 | \n", "... | \n", "12.2 | \n", "6.1 | \n", "40.2 | \n", "10:30:00 | \n", "SSE | \n", "50.0 | \n", "39° 12' 00\" N | \n", "20° 54' 00\" E | \n", "39.200000 | \n", "20.900000 | \n", "
999 rows × 23 columns
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---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | \n", "0 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "1 | \n", "14.6 | \n", "21.7 | \n", "15:10:00 | \n", "10.4 | \n", "... | \n", "0.0 | \n", "1.3 | \n", "24.1 | \n", "15:40:00 | \n", "SSE | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
1 | \n", "1 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "2 | \n", "14.3 | \n", "21.6 | \n", "17:40:00 | \n", "6.2 | \n", "... | \n", "0.4 | \n", "2.1 | \n", "22.5 | \n", "14:40:00 | \n", "ENE | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
2 | \n", "2 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "3 | \n", "14.6 | \n", "22.7 | \n", "13:40:00 | \n", "8.4 | \n", "... | \n", "3.6 | \n", "1.8 | \n", "24.1 | \n", "18:20:00 | \n", "ESE | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
3 | \n", "3 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "4 | \n", "17.6 | \n", "26.7 | \n", "15:50:00 | \n", "11.2 | \n", "... | \n", "0.2 | \n", "1.6 | \n", "17.7 | \n", "13:30:00 | \n", "WNW | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
4 | \n", "4 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "10 | \n", "5 | \n", "16.7 | \n", "26.3 | \n", "14:10:00 | \n", "10.8 | \n", "... | \n", "1.8 | \n", "2.7 | \n", "20.9 | \n", "10:40:00 | \n", "WNW | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "
87 | \n", "87 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "12 | \n", "27 | \n", "-0.4 | \n", "7.8 | \n", "15:10:00 | \n", "-6.7 | \n", "... | \n", "0.0 | \n", "1.6 | \n", "14.5 | \n", "20:10:00 | \n", "E | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
88 | \n", "88 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "12 | \n", "28 | \n", "0.2 | \n", "9.1 | \n", "15:10:00 | \n", "-5.8 | \n", "... | \n", "0.2 | \n", "1.3 | \n", "9.7 | \n", "12:00:00 | \n", "E | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
89 | \n", "89 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "12 | \n", "29 | \n", "1.1 | \n", "9.8 | \n", "15:20:00 | \n", "-4.8 | \n", "... | \n", "0.0 | \n", "1.1 | \n", "11.3 | \n", "12:20:00 | \n", "E | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
90 | \n", "90 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "12 | \n", "30 | \n", "2.1 | \n", "9.1 | \n", "13:30:00 | \n", "-3.4 | \n", "... | \n", "0.2 | \n", "1.4 | \n", "16.1 | \n", "13:40:00 | \n", "ESE | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
91 | \n", "91 | \n", "Ήπειρος | \n", "Αγία Κυριακή Ιωαννίνων | \n", "2018 | \n", "12 | \n", "31 | \n", "3.6 | \n", "6.2 | \n", "13:40:00 | \n", "-0.5 | \n", "... | \n", "0.0 | \n", "6.1 | \n", "33.8 | \n", "19:30:00 | \n", "WNW | \n", "515.0 | \n", "39° 31' 27\" N | \n", "20° 52' 55\" E | \n", "39.524167 | \n", "20.881944 | \n", "
92 rows × 23 columns
\n", "\n", " | YEAR | \n", "MONTH | \n", "DAY | \n", "RAIN | \n", "
---|---|---|---|---|
0 | \n", "2018 | \n", "10 | \n", "1 | \n", "0.0 | \n", "
1 | \n", "2018 | \n", "10 | \n", "2 | \n", "0.4 | \n", "
2 | \n", "2018 | \n", "10 | \n", "3 | \n", "3.6 | \n", "
3 | \n", "2018 | \n", "10 | \n", "4 | \n", "0.2 | \n", "
4 | \n", "2018 | \n", "10 | \n", "5 | \n", "1.8 | \n", "
... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "
87 | \n", "2018 | \n", "12 | \n", "27 | \n", "0.0 | \n", "
88 | \n", "2018 | \n", "12 | \n", "28 | \n", "0.2 | \n", "
89 | \n", "2018 | \n", "12 | \n", "29 | \n", "0.0 | \n", "
90 | \n", "2018 | \n", "12 | \n", "30 | \n", "0.2 | \n", "
91 | \n", "2018 | \n", "12 | \n", "31 | \n", "0.0 | \n", "
92 rows × 4 columns
\n", "\n", " | YEAR | \n", "MONTH | \n", "DAY | \n", "RAIN | \n", "
---|---|---|---|---|
39 | \n", "2018 | \n", "11 | \n", "9 | \n", "0.2 | \n", "
40 | \n", "2018 | \n", "11 | \n", "10 | \n", "0.2 | \n", "
41 | \n", "2018 | \n", "11 | \n", "11 | \n", "0.2 | \n", "
42 | \n", "2018 | \n", "11 | \n", "12 | \n", "0.2 | \n", "
43 | \n", "2018 | \n", "11 | \n", "13 | \n", "0.2 | \n", "
44 | \n", "2018 | \n", "11 | \n", "14 | \n", "0.0 | \n", "
45 | \n", "2018 | \n", "11 | \n", "15 | \n", "0.0 | \n", "
46 | \n", "2018 | \n", "11 | \n", "16 | \n", "5.8 | \n", "
\n", " | YEAR | \n", "MONTH | \n", "DAY | \n", "RAIN | \n", "
---|---|---|---|---|
0 | \n", "2018 | \n", "10 | \n", "1 | \n", "0.0 | \n", "
1 | \n", "2018 | \n", "10 | \n", "2 | \n", "0.4 | \n", "
2 | \n", "2018 | \n", "10 | \n", "3 | \n", "3.6 | \n", "
3 | \n", "2018 | \n", "10 | \n", "4 | \n", "0.2 | \n", "
4 | \n", "2018 | \n", "10 | \n", "5 | \n", "1.8 | \n", "
... | \n", "... | \n", "... | \n", "... | \n", "... | \n", "
87 | \n", "2018 | \n", "12 | \n", "27 | \n", "0.0 | \n", "
88 | \n", "2018 | \n", "12 | \n", "28 | \n", "0.2 | \n", "
89 | \n", "2018 | \n", "12 | \n", "29 | \n", "0.0 | \n", "
90 | \n", "2018 | \n", "12 | \n", "30 | \n", "0.2 | \n", "
91 | \n", "2018 | \n", "12 | \n", "31 | \n", "0.0 | \n", "
92 rows × 4 columns
\n", "