Data Science Questions, Problems & Solutions : TransWikia.com ~ Page 84

Python metaheuristic packages

I need to use a metaheuristic algorithm to solve an optimization problem on a Python codebase. Metaheuristics usually need to be written in C++ or Java as they involve a...

Asked on 07/07/2021 by user1403546

2 answer

Selecting a boundary on a binary classifier to optimal precision and recall

I have a logistic regression classifier that shows differing levels of performance for precision and recall at different probability boundaries as follows: ...

Asked on 07/07/2021 by Sandy Lee

1 answer

Once a predictive model is in production, how it can be evaluated?

I have a data science project, predicting customer's next purchase day. Customer's one year behavioral data was split to 9 and 3 months for train and test, using RFM analysis,...

Asked on 07/07/2021 by Mahsaem

2 answer

Chi Square Test Goodness of Fit

I want to use a chi square test but I'm unsure if I'm using it right. The KickStarter website shows the frequency of main categories projects. It is updated once...

Asked on 07/07/2021

0 answer

Should one-hot encoded categorical features needs to be scaled when used along with text feature while deriving semantic similarity?

My aim is to derive textual similarity using multiple features. Some of the features are textual for which I am using (Tfhub 2.0) Universal Sentence encoder. There are other categorical...

Asked on 07/07/2021 by Bruso

1 answer

AttributeError: 'Functional' object has no attribute 'uses_learning_phase'

I am trying to predict on my test set and I get the following errorAttributeError: 'Functional' object has no attribute 'uses_learning_phase'The model is created from the Class Model imported...

Asked on 07/07/2021

1 answer

Does it make sense to use UMAP for dimensionality reduction for modeling (rather then presentation/exploration)?

Reducing dimensionality via PCA before training is a common practice, but PCA cannot makes use of nonlinear relations between features. I read about UMAP (e.g. https://adanayak.medium.com/dimensionality-reduction-using-uniform-manifold-approximation-and-projection-umap-4aa4cef43fed), a...

Asked on 07/07/2021

1 answer

logistic like curve fitting using machine learning

I have a set of points of a function k(x). I am trying to do some curve fitting to find the exact k(x) function. It seems that the data points...

Asked on 07/07/2021

3 answer

CNN model accuracy

I have trained my CNN model on CIFAR 10 and I got val_accuracy of 87% which is not a low value but when it comes to detection of pictures my...

Asked on 07/07/2021 by Osama Hamada

1 answer

Clustering and getting threshold to classify data points

I have real world data set (120 data points) about enterprises, containing 4 features. I would like to put these enterprises in exactly 4 categories based on the values of...

Asked on 07/07/2021 by Meher Béjaoui

1 answer

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