Analisis Data Eksploratif

Memahami Ilmu Data

Hadrien Lacroix

Content Developer at DataCamp

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Analisis Data Eksploratif:

Mengeksplorasi data
Merumuskan hipotesis
Menilai karakteristik
Mengvisualisasikan

Foto John Tukey

Alur kerja data

Alur kerja ilmu data

Mari kita langsung mulai

Dataset 1        Dataset 2        Dataset 3        Dataset 4        
|x    |y    |    |x    |y    |    |x    |y    |    |x    |y    |
|-----|-----|    |-----|-----|    |-----|-----|    |-----|-----|    
|10.0 |8.04 |    |10.0 |9.14 |    |10.0 |7.46 |    |8.0  |6.58 |
|8.0  |6.95 |    |8.0  |8.14 |    |8.0  |6.77 |    |8.0  |5.76 |
|13.0 |7.58 |    |13.0 |8.74 |    |13.0 |12.74|    |8.0  |7.71 |
|9.0  |8.81 |    |9.0  |8.77 |    |9.0  |7.11 |    |8.0  |8.84 |
|11.0 |8.33 |    |11.0 |9.26 |    |11.0 |7.81 |    |8.0  |8.47 |
|14.0 |9.96 |    |14.0 |8.10 |    |14.0 |8.84 |    |8.0  |7.04 |
|6.0  |7.24 |    |6.0  |6.13 |    |6.0  |6.08 |    |8.0  |5.25 |
|4.0  |4.26 |    |4.0  |3.10 |    |4.0  |5.39 |    |19.0 |12.50|
|12.0 |10.84|    |12.0 |9.13 |    |12.0 |8.15 |    |8.0  |5.56 |
|7.0  |4.82 |    |7.0  |7.26 |    |7.0  |6.42 |    |8.0  |7.91 |
|5.0  |5.68 |    |5.0  |4.74 |    |5.0  |5.73 |    |8.0  |6.89 |

Kejutan!

Semua empat kumpulan data menampilkan:

nilai rata-rata dan varians yang identik untuk x
nilai rata-rata dan varians yang identik untuk y
koefisien korelasi identik
Persamaan regresi linier identik

Singkatnya: mereka terlihat cukup mirip.

Kuartet Anscombe

Grafik linier Anscombe

Grafik non-linier Anscombe

Regresi Anscombe yang tidak akurat

Korelasi Anscombe yang terganggu

dua-roket-mendarat-pada-saat-yang- sama

Mengetahui data Anda

Nomor Penerbangan (angka)
Tanggal (waktu)
Waktu (UTC) (tanggal dan waktu)
Versi Booster (teks)
Lokasi Peluncuran (teks)
Muatan (teks)

Massa Muatan (kg) (angka)
Orbit (teks)
Pelanggan (teks)
Hasil Misi (teks)
Hasil Pendaratan (teks)

Melihat pratinjau data Anda

Flight  Date         Time (UTC)  Booster Version  Launch Site     Payload
_______________________________________________________________________________________________________
1       2010-06-04   18:45:00    F9 v1.0 B0003    CCAFS LC-40    Dragon Spacecraft Qualification Unit
2       2010-12-08   15:43:00    F9 v1.0 B0004    CCAFS LC-40    Dragon demo flight C1, two CubeSats...
3       2012-05-22   7:44:00     F9 v1.0 B0005    CCAFS LC-40    Dragon demo flight C2+
4       2012-10-08   0:35:00     F9 v1.0 B0006    CCAFS LC-40    SpaceX CRS-1
5       2013-03-01   15:10:00    F9 v1.0 B0007    CCAFS LC-40    SpaceX CRS-2

Payload Mass (kg)    Orbit     Customer         Mission Outcome  Landing Outcome
_______________________________________________________________________________________________________
NaN                  LEO       SpaceX           Success          Failure (parachute)
NaN                  LEO (ISS) NASA (COTS) NRO  Success          Failure (parachute)
525                  LEO (ISS) NASA (COTS)      Success          No attempt
500                  LEO (ISS) NASA (CRS)       Success          No attempt
677                  LEO (ISS) NASA (CRS)       Success          No attempt

Statistik deskriptif

        Flight  Date         Time (UTC)  Booster Version  Launch Site     Payload
_______________________________________________________________________________________________________
count   55     55            55          55               55              55
unique  55     55            53          51               4               55
top     6      2018-03-30    4:45:00     F9 v1.1          CCAFS LC-40     SES-9
freq    1      1             2           5                26              1

        Payload Mass (kg)    Orbit     Customer         Mission Outcome  Landing Outcome
_______________________________________________________________________________________________________
count   53                   55        55               55               55
unique  47                   8         28               2                12
top     9,600                GTO       NASA (CRS)       Success          No attempt
freq    5                    22        14               54               18

Memvisualisasikan!

spacex_launch_count

Mengajukan lebih banyak pertanyaan!

peluncuran-spacex-per-lokasi

Mengajukan lebih banyak pertanyaan!

peluncuran- space-x-berdasarkan hasil

Pencilan

spacex-payload-mass-histogram

Ayo berlatih!

Memahami Ilmu Data