Data Science Questions, Problems & Solutions : TransWikia.com ~ Page 260

What exactly is a dummy trap? Is dropping one dummy feature really a good practice?

So I'm going through a Machine Learning course, and this course explains that to avoid the dummy trap, a common practice is to drop one column. It also explains that...

Asked on 01/02/2021

1 answer

a neural network for text based games

How can I use a neural network for this example? I have already tried perceptron , but I would like to see something else, something that can be supplemented in...

Asked on 01/02/2021 by user109082

0 answer

Similarity matching between two distinct datasets (marketing case study)

I am working for a company that sells different products to customers. My objective is to find customers that are likely to purchase product X based on the profiles of...

Asked on 01/02/2021

1 answer

Assign more importance to recent records during training

My goal is to build a classification model in order to predict if a customer will buy a product or not (binary classification). Since in the last months (let's say...

Asked on 01/02/2021 by AndreaM

0 answer

Backpropagation and gradient descent

I just want to clear one doubt - we use gradient descent to optimize the weights and biases of the neural network, and we use backpropagation for the step that...

Asked on 01/02/2021 by Luka Milivojevic

1 answer

How do we visualize data in hierarchical clustering?

Can anybody tell me how to do visualization when applying hierarchical clustering to data with more than 2 features? Do we need to do dimensionality reduction before each clustering?...

Asked on 01/02/2021 by raghav gaur

1 answer

Equivalence of Tidy Data and Third Normal Form

In Hadley Wickham's "Tidy Data" paper, he states that In tidy data:Each variable forms a column.Each observation forms a row.Each type of observational unit forms a table....

Asked on 01/02/2021 by Greg Thatcher

1 answer

Train test leakage doubt for Time series

I have a very silly doubt about potential leakage of information during train test splitting. My dataset is a timeseries of multiple features for the year of 2018 where every...

Asked on 01/01/2021 by Siddhant Tandon

0 answer

SVM overfitting with consistent validation results

I have some imbalanced (1400 samples of which 250 are +ve) data for a binary classification problem and I am running an SVM grid search optimising for precision. I am...

Asked on 01/01/2021 by Louis Ryan

0 answer

Siamese networks vs Semantic similarity (may be gensim)

I am trying to understand the Siamese networks . In this vector is calculated for an object (say an image) and a distance metric is applied (say manhatten) on two...

Asked on 01/01/2021

1 answer

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