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Data Science : Recent Questions and Answers (Page 304)

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

Why bias is not considering in Regularization?

Most of the Regularization (L1, L2 ) techniques focused mostly on the weight term only .But Regularization is not considering Bias.From my understanding large bias doesn’t make...

Asked on 11/19/2020 by BSP

2 answer

Sharing parameters of an activation across layers of a neural network

Keras now provides advanced parametric activation layers like Leaky-ReLU PReLU.Each time I add this layer to a sequential model, an additional trainable parameter is added to graph. How can...

Asked on 11/19/2020 by Astro

0 answer

How to get accuracy, F1, precision and recall, for a keras model?

I want to compute the precision, recall and F1-score for my binary KerasClassifier model, but don't find any solution. Here's my actual code: # Split dataset in train...

Asked on 11/19/2020 by ZelelB

5 answer

Whether to replace NaN values in result column

I have a training dataset where we have to predict "Result" based on features "A", "B", "C" and "D" using machine learning. For a few rows, the "Result" is empty...

Asked on 11/18/2020 by Amethyst

1 answer

Why accuracy scores reported by Keras are low and erratic while the loss on the validation set is decreasing?

I'm trying to build CNN to predict two-label classification problem. Unfortuenetely, I can't share my model architecture, but I compiled the model using:model.compile(optimizer=optimizers.Adam(lr=1e-3), ...

Asked on 11/18/2020 by jakes

0 answer

How to handle performance degradation due to domain transfers in data

I am training a classification CNN on a labeled dataset $langle x,yrangle$. The network reaches a 0.92% accuracy rate on testing and validation sets. After this process, I pre-process...

Asked on 11/17/2020

1 answer

How to determine if item-to-item similarity is high (relatively), using cosine similarity

I'm trying to explain part of my recommendations based on item similarity.I have a trained model based on Item-Item cosine similarity that performs well. Given two items, ItemA and...

Asked on 11/17/2020 by Daniel Ben Zaken

0 answer

How to choose the good number dimension of autoencoder?

I'm using Autoencoder for feature extracting. I stuck with how to choose good number of dimension of encoder layer (latent layer). After training dataset, the model gave the latent layer...

Asked on 11/17/2020

1 answer

Reducing the size of a dataset

I am trying to classify gestures. I am using Python's scikit learn library classification algorithms for that. I have collected depth images for this purpose. 200 samples are collected for...

Asked on 11/16/2020 by user5507

3 answer

Why Deep Reinforcement Learning fails to learn how to play Asteroids?

Deep Q-learning, A3C, policies evolved with genetic algorithms, they all fail to learn Asteroids, or at least perform way worse than human. From the hardest Atari games according to RL...

Asked on 11/16/2020 by hipoglucido

1 answer

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