Dataset Kredit Score (Tugas 7)#

Preprocessing Data#

import pandas as pd
import numpy as np

df = pd.read_csv("https://raw.githubusercontent.com/Irja-Multazamy/datamining/main/credit_score1.csv")

df.head()

	Unnamed: 0	kode_kontrak	pendapatan_setahun_juta	kpr_aktif	durasi_pinjaman_bulan	jumlah_tanggungan	rata_rata_overdue	risk_rating
0	1	AGR-000001	295	YA	48	5	61 - 90 days	4
1	2	AGR-000011	271	YA	36	5	61 - 90 days	4
2	3	AGR-000030	159	TIDAK	12	0	0 - 30 days	1
3	4	AGR-000043	210	YA	12	3	46 - 60 days	3
4	5	AGR-000049	165	TIDAK	36	0	31 - 45 days	2

df_without_column_for_convert = pd.DataFrame(df, columns = ['kode_kontrak','pendapatan_setahun_juta','durasi_pinjaman_bulan','jumlah_tanggungan','risk_rating'])
df_without_column_for_convert.head()

	kode_kontrak	pendapatan_setahun_juta	durasi_pinjaman_bulan	jumlah_tanggungan	risk_rating
0	AGR-000001	295	48	5	4
1	AGR-000011	271	36	5	4
2	AGR-000030	159	12	0	1
3	AGR-000043	210	12	3	3
4	AGR-000049	165	36	0	2

df_ratarata=pd.get_dummies(df['rata_rata_overdue'])
df_ratarata.head()

	0 - 30 days	31 - 45 days	46 - 60 days	61 - 90 days
0	0	0	0	1
1	0	0	0	1
2	1	0	0	0
3	0	0	1	0
4	0	1	0	0

df_kpr_aktif=pd.get_dummies(df['kpr_aktif'])
df_kpr_aktif

	TIDAK	YA
0	0	1
1	0	1
2	1	0
3	0	1
4	1	0
...	...	...
895	0	1
896	0	1
897	1	0
898	1	0
899	1	0

900 rows × 2 columns

df_new = pd.concat([df_without_column_for_convert, df_kpr_aktif,df_ratarata], axis=1)
df_new.head()

	kode_kontrak	pendapatan_setahun_juta	durasi_pinjaman_bulan	jumlah_tanggungan	risk_rating	TIDAK	YA	0 - 30 days	31 - 45 days	46 - 60 days	61 - 90 days
0	AGR-000001	295	48	5	4	0	1	0	0	0	1
1	AGR-000011	271	36	5	4	0	1	0	0	0	1
2	AGR-000030	159	12	0	1	1	0	1	0	0	0
3	AGR-000043	210	12	3	3	0	1	0	0	1	0
4	AGR-000049	165	36	0	2	1	0	0	1	0	0

df_risk_rating = pd.DataFrame(df, columns = ['risk_rating'])
df_risk_rating.head()

	risk_rating
0	4
1	4
2	1
3	3
4	2

df_without_risk_rating=df_new.drop(['risk_rating'], axis=1)

df_new2 = pd.concat([df_without_risk_rating,df_risk_rating], axis=1)
df_new2

	kode_kontrak	pendapatan_setahun_juta	durasi_pinjaman_bulan	jumlah_tanggungan	TIDAK	YA	0 - 30 days	31 - 45 days	46 - 60 days	61 - 90 days	> 90 days	risk_rating
0	AGR-000001	295	48	5	0	1	0	0	0	1	0	4
1	AGR-000011	271	36	5	0	1	0	0	0	1	0	4
2	AGR-000030	159	12	0	1	0	1	0	0	0	0	1
3	AGR-000043	210	12	3	0	1	0	0	1	0	0	3
4	AGR-000049	165	36	0	1	0	0	1	0	0	0	2
...	...	...	...	...	...	...	...	...	...	...	...	...
895	AGR-010739	112	48	5	0	1	0	0	0	0	1	5
896	AGR-010744	120	48	2	0	1	0	0	1	0	0	3
897	AGR-010758	166	24	2	1	0	1	0	0	0	0	1
898	AGR-010775	196	48	0	1	0	0	1	0	0	0	2
899	AGR-010790	204	24	2	1	0	1	0	0	0	0	1

900 rows × 12 columns

from sklearn.preprocessing import MinMaxScaler
df_for_minmax_scaler=pd.DataFrame(df, columns = ['pendapatan_setahun_juta','durasi_pinjaman_bulan','jumlah_tanggungan'])
df_for_minmax_scaler.to_numpy()
scaler = MinMaxScaler()
df_hasil_minmax_scaler=scaler.fit_transform(df_for_minmax_scaler)

df_hasil_minmax_scaler = pd.DataFrame(df_hasil_minmax_scaler,columns = ['pendapatan_setahun_juta','durasi_pinjaman_bulan','jumlah_tanggungan'])
df_hasil_minmax_scaler

	pendapatan_setahun_juta	durasi_pinjaman_bulan	jumlah_tanggungan
0	0.978261	1.000000	0.833333
1	0.873913	0.666667	0.833333
2	0.386957	0.000000	0.000000
3	0.608696	0.000000	0.500000
4	0.413043	0.666667	0.000000
...	...	...	...
895	0.182609	1.000000	0.833333
896	0.217391	1.000000	0.333333
897	0.417391	0.333333	0.333333
898	0.547826	1.000000	0.000000
899	0.582609	0.333333	0.333333

900 rows × 3 columns

df_drop_column_for_minmaxscaler=df_new2.drop(['pendapatan_setahun_juta','durasi_pinjaman_bulan','jumlah_tanggungan'], axis=1)
df_drop_column_for_minmaxscaler

	kode_kontrak	TIDAK	YA	0 - 30 days	31 - 45 days	46 - 60 days	61 - 90 days	> 90 days	risk_rating
0	AGR-000001	0	1	0	0	0	1	0	4
1	AGR-000011	0	1	0	0	0	1	0	4
2	AGR-000030	1	0	1	0	0	0	0	1
3	AGR-000043	0	1	0	0	1	0	0	3
4	AGR-000049	1	0	0	1	0	0	0	2
...	...	...	...	...	...	...	...	...	...
895	AGR-010739	0	1	0	0	0	0	1	5
896	AGR-010744	0	1	0	0	1	0	0	3
897	AGR-010758	1	0	1	0	0	0	0	1
898	AGR-010775	1	0	0	1	0	0	0	2
899	AGR-010790	1	0	1	0	0	0	0	1

900 rows × 9 columns

df_new3 = pd.concat([df_drop_column_for_minmaxscaler,df_hasil_minmax_scaler], axis=1)
df_new3

	kode_kontrak	TIDAK	YA	0 - 30 days	31 - 45 days	46 - 60 days	61 - 90 days	> 90 days	risk_rating	pendapatan_setahun_juta	durasi_pinjaman_bulan	jumlah_tanggungan
0	AGR-000001	0	1	0	0	0	1	0	4	0.978261	1.000000	0.833333
1	AGR-000011	0	1	0	0	0	1	0	4	0.873913	0.666667	0.833333
2	AGR-000030	1	0	1	0	0	0	0	1	0.386957	0.000000	0.000000
3	AGR-000043	0	1	0	0	1	0	0	3	0.608696	0.000000	0.500000
4	AGR-000049	1	0	0	1	0	0	0	2	0.413043	0.666667	0.000000
...	...	...	...	...	...	...	...	...	...	...	...	...
895	AGR-010739	0	1	0	0	0	0	1	5	0.182609	1.000000	0.833333
896	AGR-010744	0	1	0	0	1	0	0	3	0.217391	1.000000	0.333333
897	AGR-010758	1	0	1	0	0	0	0	1	0.417391	0.333333	0.333333
898	AGR-010775	1	0	0	1	0	0	0	2	0.547826	1.000000	0.000000
899	AGR-010790	1	0	1	0	0	0	0	1	0.582609	0.333333	0.333333

900 rows × 12 columns

df_new3_without_risk_rating=df_new3.drop(['risk_rating'], axis=1)
df_new3_without_risk_rating

	kode_kontrak	TIDAK	YA	0 - 30 days	31 - 45 days	46 - 60 days	61 - 90 days	> 90 days	pendapatan_setahun_juta	durasi_pinjaman_bulan	jumlah_tanggungan
0	AGR-000001	0	1	0	0	0	1	0	0.978261	1.000000	0.833333
1	AGR-000011	0	1	0	0	0	1	0	0.873913	0.666667	0.833333
2	AGR-000030	1	0	1	0	0	0	0	0.386957	0.000000	0.000000
3	AGR-000043	0	1	0	0	1	0	0	0.608696	0.000000	0.500000
4	AGR-000049	1	0	0	1	0	0	0	0.413043	0.666667	0.000000
...	...	...	...	...	...	...	...	...	...	...	...
895	AGR-010739	0	1	0	0	0	0	1	0.182609	1.000000	0.833333
896	AGR-010744	0	1	0	0	1	0	0	0.217391	1.000000	0.333333
897	AGR-010758	1	0	1	0	0	0	0	0.417391	0.333333	0.333333
898	AGR-010775	1	0	0	1	0	0	0	0.547826	1.000000	0.000000
899	AGR-010790	1	0	1	0	0	0	0	0.582609	0.333333	0.333333

900 rows × 11 columns

df_new4 = pd.concat([df_new3_without_risk_rating,df_risk_rating], axis=1)
df_new4

	kode_kontrak	TIDAK	YA	0 - 30 days	31 - 45 days	46 - 60 days	61 - 90 days	> 90 days	pendapatan_setahun_juta	durasi_pinjaman_bulan	jumlah_tanggungan	risk_rating
0	AGR-000001	0	1	0	0	0	1	0	0.978261	1.000000	0.833333	4
1	AGR-000011	0	1	0	0	0	1	0	0.873913	0.666667	0.833333	4
2	AGR-000030	1	0	1	0	0	0	0	0.386957	0.000000	0.000000	1
3	AGR-000043	0	1	0	0	1	0	0	0.608696	0.000000	0.500000	3
4	AGR-000049	1	0	0	1	0	0	0	0.413043	0.666667	0.000000	2
...	...	...	...	...	...	...	...	...	...	...	...	...
895	AGR-010739	0	1	0	0	0	0	1	0.182609	1.000000	0.833333	5
896	AGR-010744	0	1	0	0	1	0	0	0.217391	1.000000	0.333333	3
897	AGR-010758	1	0	1	0	0	0	0	0.417391	0.333333	0.333333	1
898	AGR-010775	1	0	0	1	0	0	0	0.547826	1.000000	0.000000	2
899	AGR-010790	1	0	1	0	0	0	0	0.582609	0.333333	0.333333	1

900 rows × 12 columns

Naive Bayes Classifier#

from sklearn.metrics import make_scorer, accuracy_score,precision_score
from sklearn.metrics import accuracy_score ,precision_score,recall_score,f1_score
from sklearn.metrics import confusion_matrix
from sklearn.model_selection import KFold,train_test_split,cross_val_score
from sklearn.naive_bayes import GaussianNB
from sklearn.model_selection import train_test_split

X=df_new4.iloc[:,1:10].values
y=df_new4.iloc[:,11].values

X_train,X_test,y_train,y_test=train_test_split(X,y,test_size=0.3,random_state=0)

gaussian = GaussianNB()
gaussian.fit(X_train, y_train)
Y_pred = gaussian.predict(X_test) 
accuracy_nb=round(accuracy_score(y_test,Y_pred)* 100, 2)
acc_gaussian = round(gaussian.score(X_train, y_train) * 100, 2)

cm = confusion_matrix(y_test, Y_pred)
accuracy = accuracy_score(y_test,Y_pred)
precision =precision_score(y_test, Y_pred,average='micro')
recall =  recall_score(y_test, Y_pred,average='micro')
f1 = f1_score(y_test,Y_pred,average='micro')
print('Confusion matrix for Naive Bayes\n',cm)
print('accuracy_Naive Bayes: %.3f' %accuracy)
print('precision_Naive Bayes: %.3f' %precision)
print('recall_Naive Bayes: %.3f' %recall)
print('f1-score_Naive Bayes : %.3f' %f1)

Confusion matrix for Naive Bayes
 [[69  0  0  0  0]
 [ 0 49  0  0  0]
 [ 0  0 84  0  0]
 [ 0  0  0 36  0]
 [ 0  0  0  0 32]]
accuracy_Naive Bayes: 1.000
precision_Naive Bayes: 1.000
recall_Naive Bayes: 1.000
f1-score_Naive Bayes : 1.000

Create model for naive bayes

# import pandas
# from sklearn import model_selection
# from sklearn.linear_model import LogisticRegression
# import pickle
# model = GaussianNB()
# model.fit(X_train, y_train)
# # save the model to disk
# filename = 'finalized_model.sav'
# pickle.dump(model, open(filename, 'wb'))
 
# # some time later...
 
# # load the model from disk
# loaded_model = pickle.load(open(filename, 'rb'))

# print(result)

KNN Classifier#

from sklearn.neighbors import KNeighborsClassifier
neigh = KNeighborsClassifier(n_neighbors=3)
neigh.fit(X_train, y_train)

acc_knn = round(neigh.score(X_train, y_train) * 100, 2)
print(acc_knn)

100.0

Decision Tree#

from sklearn.metrics import accuracy_score
from sklearn import tree
from sklearn import metrics
from matplotlib import pyplot as plt

# Menghitung akurasi dengan menggunakan gini indek
clf = tree.DecisionTreeClassifier(criterion="gini")
clf = clf.fit(X_train,y_train)

y_pred = clf.predict(X_test)

print("Accuracy_Decision Tree :",metrics.accuracy_score(y_test,y_pred))

Accuracy_Decision Tree : 1.0

# gambar bentuk decision tree

plt.figure(figsize=(15,15))
#create the tree plot
a = tree.plot_tree(clf,
                   rounded = True,
                   filled = True,
                   fontsize=8)
#show the plot
plt.show()

My sample book

Dataset Kredit Score (Tugas 7)

Contents

Dataset Kredit Score (Tugas 7)#

Preprocessing Data#

Naive Bayes Classifier#

KNN Classifier#

Decision Tree#