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Questions tagged [multiclass-classification]

776 questions
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How to add a new class to an existing classifier in deep learning?

I trained a deep learning model to classify the given images into three classes. Now I want to add one more class to my model. I tried to check out "Online learning", but it seems to train on new data for existing classes. Do I need to train my…
Surya
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More than one prediction in multi-classification in Keras?

I am learning about designing Convolutional Neural Networks using Keras. I have developed a simple model using VGG16 as the base. I have about 6 classes of images in the dataset. Here are the code and description of my model. model =…
TMS
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Which is the loss function for multi-class classification in XGBoost?

I'm trying to know which loss function uses XGBoost for multi-class classification. I found in this question the loss function for logistic classification in the binary case. I had though that for the multi-class case it might be the same as in GBM…
Anabel Gómez
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Multi-Class or Multi-Label Classification with LightGBM

I am working on a classification project that an outcome may belong to multiple classes. For example, the outcomes may belong to Class A, B, and/or C; e.g., A, B, A&B, A&C, B&C, etc. However, I want to predict the probability of a class. For…
David293836
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What is the use of base_score in xgboost multiclass working?

I am trying to explore the working of Xgboost binary classification as well as for multi-class. In case of binary class, i observed that base_score is considered as starting probability and it also showed major impact while calculating Gain and…
jayantphor
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Multi-class, multi-label, ordinal classification with sklearn

I was wondering how to run a multi-class, multi-label, ordinal classification with sklearn. I want to predict a ranking of target groups, ranging from the one that is most prevalant at a certain location (1) to the one that is least prevalent (7).…
Lemor
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SpaCy - ValueError: operands could not be broadcast together with shapes (1,2) (1,5)

In relation to the previous post on stackoverflow Model() got multiple values for argument 'nr_class' - SpaCy multi-classification model (BERT integration) in which my problem partialy have beed resolved I wanted to share the issue which comes up…
Henryk Borzymowski
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Something wrong when implementing SVM One-vs-all in python

I was trying to verify that I had correctly understood how SVM - OVA (One-versus-All) works, by comparing the function OneVsRestClassifier with my own implementation. In the following code, I implemented num_classes classifiers in the training…
Alessandro
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How to draw the hyperplanes for SVM One-Versus-All?

I was trying to draw the hyperplanes when SVM-OVA was performed as following: import matplotlib.pyplot as plt import numpy as np from sklearn.svm import SVC x = np.array([[1,1.1],[1,2],[2,1]]) y = np.array([0,100,250]) classifier =…
Alessandro
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Calculating accuracy for multi-class classification

Consider a three class classification problem with the following confusion matrix. cm_matrix = predict_class1 predict_class2 predict_class3 ______________ ______________ ______________ Actual_class1 …
Sm1
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Python/ML: Which methods to use for Multiclass Classification for Product Categorization?

In a pickle... I have a dataset with >100,000 observations; datasets' columns include CustomerID, VendorID, ProductID and CatNMap. Here is what it looks like: As you can see values represented in first 3 columns (CustomerID, VendorID, ProductID)…
DGomonov
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ML.NET - Schema mismatch for feature column 'Features': expected Vector, got Vector

I just try to make my first ML.NET project, that I have built before with Azure ML, Visual Interface, Python and so on, but now I wanted to do it with C#. I was following this tutorial, but with a totally different dataset and purpose. The dataset…
Eve
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feature importance for each class in multiclass classification

I built a decision tree and it also gives me the feature importance for my classification. But how can I tell my program to give me the feature importance for each of my classes? To give me the overall feature importance I have this…
maybeyourneighour
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Model() got multiple values for argument 'nr_class' - SpaCy multi-classification model (BERT integration)

Hi I am working on implementing a multi-classification model (5 classes) with the new SpaCy Model en_pytt_bertbaseuncased_lg. The code for the new pipe is here: nlp = spacy.load('en_pytt_bertbaseuncased_lg') textcat = nlp.create_pipe( …
Henryk Borzymowski
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Python: Logistic regression max_iter parameter is reducing the accuracy

I am doing multiclass/multilabel text classification. I trying to get rid of the "ConvergenceWarning". When I tuned the max_iter from default to 4000, the warning is disappeared. However, my model accuracy is reduced from 78 to 75. from…
nurlubanu
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