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.

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categorical_crossentropy, expected y_pred.shape to be (batch_size, num_classes) with num_classes > 1

I am applying ANN to iris dataset and it gives me this error: Model.fit(x_train, y_train, epochs=100, batch_size=2) SyntaxWarning: In loss categorical_crossentropy, expected y_pred.shape to be (batch_size, num_classes) with num_classes > 1.…
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How to apply onehot encoder over vectorized dataframe columns?

Suppose that we have this data frame: ID CATEGORIES 0 ['A'] 1 ['A', 'C'] 2 ['B', 'C'] And I want to apply one hot encoder to categories column. The result I want is ID A B C 0 1 0 0 1 1 0 1 2 0 1 1 I know it can be…
sbb
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How to reverse one-hot encoding in Python?

I am currently creating a CNN where the main task the network has is to classify input information into different classes. These classes are exact values of the predicted frequencies. This is what I have built so far: def evaluate_model(X_train,…
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How to use prediction model after onehot encoding?

I have created a prediction model for this dataset >>df.head() Service Tasks Difficulty Hours 0 ABC 24 1 0.833333 1 CDE 77 1 1.750000 2 SDE 90 3 3.166667 3 QWE …
sebin
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How do I concatenate two tensorflow tensors of the same size in one dimension but different size in the other?

I'm trying to carry out one-hot encoding with the tensorflow API. To do so you need to specify the number of distinct values up front so I've had to iterate through each variable and count the distinct values in each case. This leaves me with a…
George Pearse
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how to convert object Dtype to int64?

I've the below data. When I checked the DType of these fields it is showing as object, now my requirement is I would like to convert them into int64 # Column Non-Null Count Dtype --- ------ -------------- ----- 0 area_type…
Vikas
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why I get in Z1 2 columns instead of 3 and how to fix it using hotEncoder

I'm using hotEncoder for a column with 5 values witch gave me 5 columns (for Z). That's OK now I have another column with has 3 values but I got 2 columns instead of 3 in Z1 what I need to do in the code to fix that I'll get 3 columns in Z1? also,…
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What is wrong here with OneHotEncoding()?

Please Open the Image for the problem All the problem is with Embarked Attribute. Whenever in onehotencoding() I remove column no 11, the fit_transform() works fine. But when I add the 11th column again, i get the Value error saying input contains…
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OneHotEncoding 2500 different categorical variables

I am working on a flight recommendation project where airport codes of each source will be given along with some data. with that i have to predict the destination to which airplane can reach. I have to deal with 6+ million rows. so I am facing a…
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Apply one hot encoding on a dataframe in python

I'm working on a dataset in which I have various string column with different values and want to apply the one hot encoding. Here's the sample dataset: v_4 v5 s_5 vt_5 ex_5 pfv pfv_cat 0-50 …
Abdul Rehman
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Creating one hot encoded columns while preserving other features

I've got the following data: dataset <- structure(list(id = structure(c(2L, 3L, 1L, 3L, 1L, 9L), .Label = c("215101", "215559", "216566", "217284", "219435", "220209", "220249", "220250", "225678", "225679", "225687", "225869", "228420", "228435",…
jakes
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One-hot encoding in R- creating dataframe column names from variables in a loop

I am using a dataframe called "rawData" which has a column called "Season" with values ranging from 1 to 4. I am trying to use a loop to perform one-hot-encoding, i.e create 4 new columns called "Season 1" , "Season 2", "Season 3", "Season 4", where…
stats_nerd
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want to group categorical values in a column

I am trying to group & assign a numeric value to a column 'neighborhood' having values like: #Queens#Jackson Heights#, #Manhattan#Upper East Side#Sutton Place#, #Brooklyn#Williamsburg#,#Bronx#East Bronx#Throgs Neck#. (Values have 2,3 sometimes 4,5…
Rucha
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applying onehotencoder on numpy array

I am applying OneHotEncoder on numpy array. Here's the code print X.shape, test_data.shape #gives 4100, 15) (410, 15) onehotencoder_1 = OneHotEncoder(categorical_features = [0, 3, 4, 5, 6, 8, 9, 11, 12]) X =…
prashantitis
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K-means clustering on data set with mixed data using Scikit-learn

I am experimenting with machine learning algorithms and have a pretty large data set containing both numerical and categorical data. I followed this post here: http://www.ritchieng.com/machinelearning-one-hot-encoding/ to encode categorical features…
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