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Data Science : Recent Questions and Answers (Page 256)

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

SMOTE vs SMOTE-NC for binary classifier with categorical and numeric data

I am using Xgboost for classification. My y is 0 or 1 (true or false). I have categorical and numeric features, so theoretically, I need to use SMOTE-NC instead of...

Asked on 01/06/2021 by RafalQA

1 answer

How does the descending gradient know what weights to adjust?

I was reading about descending gradient.How does the descending gradient know what weights to adjust?Does it adjust to all network weights at the same time? Does each weight...

Asked on 01/06/2021 by molo32

2 answer

sklearn - SimpleImputer in an empty Pipeline

When building a Pipeline I'm ending up at a scenario that can be simplified like this: FeatureUnion(NumericalPipeline(steps), CategoricalPipeline(steps)) Since this is one intermediary step in a larger Pipeline, I'm feeding...

Asked on 01/06/2021

1 answer

Agglomerative Hierarchial Clustering in python using DTW distance

I am new to both data science and python.I have a dataset of the time-dependent samples, which I want to run agglomerative hierarchical clustering on them. I have found...

Asked on 01/05/2021 by user3806649

1 answer

Can Shapley/Lime values be used for unsupervised learning?

One thing that is really useful when trying to understand what a machine learning model does, is seeing why some instances got predicted. For that Shapley Values...

Asked on 01/05/2021

1 answer

Genetic algorithm only using selection

Suppose you have a population of N individuals with fitness 1, 2, . . . , N (i.e., all individuals have aunique fitness value). Suppose you repeatedly apply tournament...

Asked on 01/05/2021

1 answer

Face Recognition using Eigenfaces and SVM

I am new to machine learning. I want to develop a face recognition system using scikit-learn. This is the example given in the tutorials of scikit-learn. I...

Asked on 01/05/2021 by enterML

1 answer

Intuitive explanation for representing gradient in higher dimensions

I do not understand how complex networks with many parameters/dimensions can be represented in a 3D space, and form a standard cost surface just like a simple network with, say,...

Asked on 01/05/2021 by forhayley

2 answer

Output landscape of ReLU, Swish and Mish

I found the following figure in the original Mish paper (https://arxiv.org/abs/1908.08681). I understand that this figure describes...

Asked on 01/05/2021 by shaurov2253

1 answer

Methods for augmenting binary datasets

I have a small (~100 samples) dataset with roughly 20 features which are mostly binary, and a few are numeric (~5). I wanted to use methods for augmenting the training...

Asked on 01/05/2021 by S_S

1 answer

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