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Data Science : Recent Questions and Answers (Page 14)

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

How can I do nested cross validation for multivariate Time series forecsting

I'm trying to do nested CV for my multivariate time series but I'm really confused how to do it. I have 7 Time series which are the inputs of my...

Asked on 11/22/2021

0 answer

Checkerboard artefacts vs distinct objects in GANs

I found a very good solution for getting rid of checkerboard artefacts in GANs: https://github.com/junyanz/pytorch-CycleGAN-and-pix2pix/issues/190 Instead of using Transposed Convolution, use bilinear upsampling ...

Asked on 11/22/2021

0 answer

Mathematics: Writing down a three-class classifier confusion matrix

Confusion matrix 2A three-class classifier is evaluated on a test setof 900 samples which containsall three classes in equalproportions.• Classes 2 and 3 are always classified correctly•...

Asked on 11/22/2021

1 answer

Voting classifier using grid search for Time Series

I have three models:ArimaAuto ARIMADouble Exponential SmoothingI would like to apply an ensemble method - a voting method and allow the classifier to learn weights for these three models. I...

Asked on 11/20/2021

1 answer

Feature importance for particular classes

Suppose I have a dataset labeled with two classes such as healthy and unhealthy and I applied feature selection (feature importance) on the dataset. How can I know if the...

Asked on 11/20/2021

2 answer

Canny edge detection not working on Gaussian blurred images

I am trying to detect edges on this lane image. First blurred the image using Gaussian filter and applied Canny edge detection but it gives only blank image without detecting...

Asked on 11/20/2021

1 answer

Passing Dependency/Constituency trees to a Neural Machine Translator

I am working on a project on Neural Machine Translation in the English-Irish domain. I am not an expert and have researched entirely on my own for a technology...

Asked on 11/20/2021

1 answer

How to achieve SHAP values for a CatBoost model in R?

I'm asked to create a SHAP analysis in R but I cannot find it how to obtain it for a CatBoost model. I can get the SHAP values of an...

Asked on 11/20/2021

1 answer

Accuracy gain vs amount of data in Neural Networks

There's a theoretical question I tackled upon in the excellent book Neural Networks and Deep Learning by Michael Nielsen, which I would love to discuss about. The question is:How do...

Asked on 11/20/2021

0 answer

How to use PCA in CNN for image recognition using Keras?

I created a CNN model for image classification and I want to use Principal Component Analysis (PCA) but when I run pca.fit() code, the code still running for hours and...

Asked on 11/19/2021

1 answer

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