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Data Science : Recent Questions and Answers (Page 67)

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

Understanding lime.submodular_pick on text

I have binary document classification task (class labels 0 and 1). I use a keras network (functional API) and run the LimeTextExplainer.from lime.lime_text import LimeTextExplainerfrom lime import lime_textexplainer =...

Asked on 07/28/2021

0 answer

Using SMOTENC in a pipeline

I am trying to figure out the appropriate way to build a pipeline to train a model which includes using the SMOTENC algorithm:Given that the N-Nearest Neighbors algorithm and Euclidian...

Asked on 07/28/2021

1 answer

NLP Subjectivity Detection methodology?

I am working on a project where I would like to be able to specifically analyze the level of subjectivity in a given text phrase using machine learning. Essentially, I...

Asked on 07/28/2021

0 answer

Sparse Covariance Selection

I was reading this article https://www.di.ens.fr/~aspremon/PDF/CovSelSIMAX.pdf, whose goal is to estimate the covariance matrix from a the sample covariance matrix drawn from a distribution $X$. '...

Asked on 07/28/2021

0 answer

What is the use of using width/height shift in data augmentation?

I'm not sure to understand the use of augmentation data using width shift and height shift. Say I have limited image data, and I want to create new data using...

Asked on 07/28/2021 by JPeterson

2 answer

Clustering of multi-label data

The dataset consists of 1) a set of objects and 2) a set of labels, which are used to describe the objects. For the moment, for simplicity...

Asked on 07/28/2021 by Yogesch

1 answer

UNet Model accuracy is stuck at exact 0.5 (neither more or less) (No class imbalance, tried tuning learning rate)

This is using PyTorch I have been trying to implement UNet model on my images, however, my model accuracy is always exact 0.5. Loss does decrease. I have also checked...

Asked on 07/27/2021 by Sulphur

1 answer

Python implementation of cost function in logistic regression: why dot multiplication in one expression but element-wise multiplication in another

I have a very basic question which relates to Python, numpy and multiplication of matrices in the setting of logistic regression. First, let me apologise for not using math notation....

Asked on 07/27/2021 by GhostRider

3 answer

Visualising K-Means clusters for 3D data in R

I have an excel file that contains 485k rows x 3 columns of integer values. Sample data:cluster.x cluster.y cluster.z1 ...

Asked on 07/27/2021 by zlee11

1 answer

How to treat the undefined values which make sense?

I'm currently trying to create a few features to improve the performances of a model. One of those features that I would like to create corresponds to the difference in...

Asked on 07/27/2021 by qwertzuiop

2 answer

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