Getting value error when trying to inverse transform using label encoder after applying clustering algorithm

Asked Jul 31 '19 at 11:17

Active Jul 31 '19 at 11:40

Viewed 200 times

where i am using label encoder to label the categorical column. However while transforming it back, i'm getting value error

I have used Label encoder from sklearn

Code:

    from sklearn.preprocessing import LabelEncoder
    enc = LabelEncoder()
    label_encoder = enc.fit(Final.iloc[:,3])
    print ("Categorical classes:", label_encoder.classes_)
    integer_classes = label_encoder.transform(label_encoder.classes_)
    print ("Integer classes:", integer_classes)
    t = label_encoder.transform(Final.iloc[:,3])
    Final.iloc[:, 3] = t

    data = Final.iloc[:,3:11]
    from sklearn.ensemble import IsolationForest
    import numpy as np


    clf=IsolationForest(n_estimators=100, max_samples='auto', contamination=float(.03))
    clf.fit(data)
    pred = clf.predict(data)

    Final['anomaly']=pred
    outliers=Final.loc[Final['anomaly']==-1]
    outlier_index=list(outliers.index)

    print(Final['anomaly'].value_counts())


    t = label_encoder.inverse_transform(Final.iloc[:,3])
    Final.iloc[:,3] = t

Error:

     ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

edited Jul 31 '19 at 11:40

asked Jul 31 '19 at 11:17

anagha s

just tell me the shape of 't' please – Fasty Jul 31 '19 at 11:25
Its showing something like this - (1161,). 1161 is row, and column it is not showing – anagha s Jul 31 '19 at 11:31
It works fine when I use an example...! – Fasty Jul 31 '19 at 11:35
I am using clustering algorithm in between, and with that i'm facing the above error – anagha s Jul 31 '19 at 11:37
You are using clustering...how come there are labels, its an unsupervised learning algorithm – Fasty Jul 31 '19 at 11:38
I'am converting the categorical values to "levels" which is termed as labels – anagha s Jul 31 '19 at 11:41
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/197268/discussion-between-ram-shanker-g-and-anagha-s). – Fasty Jul 31 '19 at 11:42

Getting value error when trying to inverse transform using label encoder after applying clustering algorithm

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