Questions tagged [one-hot-encoding]

One-Hot Encoding is a method to encode categorical variables to numerical data that Machine Learning algorithms can deal with. One-Hot encoding is most used during feature engineering for a ML Model. It converts categorical values into a new categorical column and assign a binary value of 1 or 0 to those columns.

Also known as Dummy Encoding, One-Hot Encoding is a method to encode categorical variables, where no such ordinal relationship exists, to numerical data that Machine Learning algorithms can deal with. One hot encoding is the most widespread approach, and it works very well unless your categorical variable takes on a large number of unique values. One hot encoding creates new, binary columns, indicating the presence of each possible value from the original data. These columns store ones and zeros for each row, indicating the categorical value of that row.

1224 questions
-2
votes
1 answer

Value Error : One Hot Encoder

I have Label Encoded my info.venue column as follows, but when i try to do the One Hot Encoding it gives error. as ValueError: Expected 2D array, got 1D array instead. df['info.venue']=labelencoder.fit_transform(df['info.venue']) from…
Mayur Mahajan
  • 122
  • 11
-2
votes
1 answer

How to one hot encode factor variable that has more than 3 levels?

I want to represent factor variables as 0 and 1 value through one hot encoding in r as data.frame. Among the factor variables, I would like to perform one hot encode only for variables with three or more levels. This is my R…
신익수
  • 67
  • 3
  • 8
-2
votes
1 answer

How to revert One-Hot Enoding in Spark (Scala)

After running k-means (mllib spark scala) I want to make sense of the cluster centers I obtained from data which I pre-processed using (among other transformers) mllib's OneHotEncoder. A center looks like this: Cluster Center 0 …
-3
votes
2 answers

count the number of occurance of each one hot code

I have a list of numpy arrays (one-hot represantation) like the example bellow, I want to count the number of occurances of each one-hot code. [0 0 1 0 0 0 0 0 0 0] [0 0 1 0 0 0 0 0 0 0] [0 1 0 0 0 0 0 0 0 0] [0 0 0 0 0 1 0 0 0 0] [0 1 0 0 0 0 0 0 0…
ProgrX
  • 111
  • 1
  • 2
  • 15
-3
votes
1 answer

why doesn't the looping works in onehot encoding

for i in data.columns: top_10 = [x for x in data.i.value_counts().sort_values(ascending=False).head(10).index] for label in top_10: data[label] = np.where(data['i'] == label, 1, 0) data[['i'] + top_10] what is the mistake?
Os Snehith Ab
  • 67
  • 1
  • 7
-3
votes
1 answer

TypeError: argument must be a string or number on column with strings that are numbers

I have a dataset with categories. In column 4 I have 2 values( two and four which are strings). Do you know why I get the error and how to fix it?TypeError: argument must be a string or number Traceback (most recent call last): File "C:..".py",…
-3
votes
2 answers

Categorical Data - One-hot encoding

I have a large list of strings. Each string is a different example in the training dataset and contains a list of categories, whereby each category is separated by a comma. Eg. mesh = ['aligator, dog, cat', 'cat, mouse, aligator', ''] Some examples…
scutnex
  • 813
  • 1
  • 9
  • 19
1 2 3
81
82