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Data Science : Recent Questions and Answers (Page 64)

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

Should I include all dummy variables or N-1 dummy variables (keep one as reference) in neural networks

I have a categorical variable with N factor levels (e.g. gender has two levels) in classification problem. I have converted it into dummy variables (male and female). I have to...

Asked on 07/31/2021

1 answer

Understanding Transfer Learning of Word Embeddings

I can't quite visualize how transfer learning of pre-trained word embeddings is useful in an NLP task( say named entity recognition ) . I'm studying Andrew NG's Sequence Models course...

Asked on 07/31/2021 by AnonymousMe

1 answer

How to label and detect the document text images

This is what I mean as document text image: I want to label the texts in image as separate blocks and...

Asked on 07/31/2021

2 answer

Machine Learning & Image Recognition: How to start?

I've been a full stack web developer for 15 years now and would like to be involved in machine learning. There is already a specific scenario for this: We have...

Asked on 07/31/2021 by TorbenL

0 answer

Multiple Time Series Forecasting with limited data

I'm doing time series forecasting for the sales of an assortment of items. The data set I have contains two years of sales record of items that are may or...

Asked on 07/31/2021 by Shan Jiang

0 answer

Can the attention mask hold values between 0 and 1?

I am new to attention-based models and wanted to understand more about the attention mask in NLP models.attention_mask: an optional torch.LongTensor of shape [batch_size, sequence_length] with indicesselected in [0,...

Asked on 07/31/2021

1 answer

Unbalanced data set - how to optimize hyperparams via grid search?

I would like to optimize the hyperparameters C and Gamma of an SVC by using grid search for an unbalanced data set. So far I have used class_weights='balanced' and selected...

Asked on 07/31/2021 by Code Now

1 answer

Find effective feature on machine learning classification task with scikit-learn

I'm tackling a binary classification task using SVM implemented in python scikit-learn. Datasize is around 10,000 and the number of feature is 34. After finding nice parameter set (using RandomizedSearchCV...

Asked on 07/31/2021 by Light Yagmi

3 answer

Generalized Hebbian Algoithm (GHA) stability issues

The GHA proposed by Sanger in 1989 is supposed to be very numerically stable. There are some implementations of it floating around, for example this one https://github.com/matwey/python-gha....

Asked on 07/31/2021 by feggak

0 answer

Time series forecasting for stable pattern with some sudden changes

In my case, the time series is around a constant value with very small fluctuations. But, sometimes the signal starts increasing or decreasing for some duration of time. For my...

Asked on 07/31/2021 by HH____HH

0 answer

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