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Data Science : Recent Questions and Answers (Page 200)

Find answers to your questions about Data Science or help others by answering their Data Science questions.

How many instances should be synthesized for each class when using over-sampling techniques?

As for an imbalanced multi-class dataset, how many instances should be synthesized for each class if we use over-sampling techniques such as SMOTE? For example, there is 4 class including...

Asked on 03/02/2021 by Zihe Liu

0 answer

Feature construction widget on Orange 3.13

I got stucked with this widget... I am an absolute beginner and I am now working with Orange software for my thesis with logs and core data.I need to...

Asked on 03/02/2021 by Mao

1 answer

How to predict orders with a range of items?

So I do have data like this: With the help of distinct order IDs, I can figure out how many...

Asked on 03/02/2021 by Retro Invader

0 answer

How does Keras calculate the categorical cross-entropy?

From https://towardsdatascience.com/cross-entropy-for-classification-d98e7f974451 I understand that categorical cross-entropy is -log(q(x)) When using tf.keras.losses.CategoricalCrossentropy I assume that loss is calculated per batch and per epoch as...

Asked on 03/02/2021 by Tie-fighter

0 answer

Uploading images folder from my system into Google Colab

I want to train a deep learning model on a dataset containing around 3000 images. Since the dataset is huge, I want to use Google colab since it's GPU supported....

Asked on 03/02/2021 by chatbot_chakra

6 answer

What does MiniBatchKMeans fit's reassignment_ratio parameter do exactly?

I am using scikit-learn MiniBatchKMeans to do text clustering. In the constructor method, there is a parameter reassignment_ratio, which is described in the documentation (link above) as...

Asked on 03/02/2021

0 answer

Information bottleneck and deep neural network

I learned about "the information bottleneck view of deep learning."But in a nutshell, what does this tell us? I don't see what the role is of depth in this...

Asked on 03/02/2021 by induction601

0 answer

How can I efficiently represent statistics and visualizations for a large number of features?

Suppose I have a dataset with more than 50 features (could be 100 or 10,000, etc.). I'd like to create a summary table that has some statistics about each feature...

Asked on 03/01/2021 by HS-nebula

0 answer

How do anchor boxes in object detection work?

I wanted to get more into detail of anchor boxes. However from looking through associated code and papers, I could not grasp the concept in its full detail. I had...

Asked on 03/01/2021 by Yuan Li

0 answer

CART algorithm (Classification and regression trees) question

So this is taken from an exam I just did. I'd like to know if there are any instances same as in...

Asked on 03/01/2021 by crommy

3 answer

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