Data Science Stack Exchange
Data Science Stack Exchange

Questions tagged [difference]

19 questions
62
votes
3 answers

LeakyReLU vs PReLU

I thought both, PReLU and Leaky ReLU are: $$f(x) = \max(x, \alpha x) \qquad \text{ with } \alpha \in (0, 1)$$ Keras, however, has both functions in the docs. Leaky ReLU Source of LeakyReLU: return K.relu(inputs, alpha=self.alpha) Hence (see relu…
Martin Thoma
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17
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2 answers

What is the difference between active learning and reinforcement learning?

From Wikipedia: Active learning is a special case of machine learning in which a learning algorithm can interactively query a user (or some other information source) to label new data points with the desired outputs. Reinforcement learning (RL)…
Moradnejad
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13
votes
2 answers

dataframe.columns.difference() use

I am trying to find the working of dataframe.columns.difference() but couldn't find a satisfactory explanation about it. Can anyone explain the working of this method in detail?
Parth S.
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10
votes
3 answers

Kaggle notebook Vs Google Colab

What are the major differences between Kaggle notebook and Google Colab notebook? To work on a dataset my first step is to start a Kaggle notebook but then I cant help thinking what could be the advantage of using Colab notebook instead. I know few…
ashraf
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7
votes
1 answer

Are Machine Learning Weather Prediction models better than classic weather forecast?

We all know that, there are weather prediction models and case studies. But I don't understand the reason, why people trust them rather than weather forecast on TV. I mean, what is advantages of Machine Learning weather prediction over classic…
Anar
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5
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3 answers

What's the difference between data classification and clustering (from a Data point of view)

What are the differences and the similarities between data classification (using dedicated distance-based methods) and data clustering (which has certain defined methods such as k-means) Is data classification a sub-topic of data clustering ?
Sam
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5
votes
2 answers

Feeding 3 consecutive video frames to a CNN to track a tennis ball

I want to use CNN transfer learning to track a tennis ball from TV broadcasts of tennis matches. I used VGG annotating tool annotation tool link (use version 1 of the tool for compatibility with matterport code) and have about 200 frames annotated…
mLstudent33
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4
votes
2 answers

Which statistical test should I use to show significance in favour of a system?

I have a dataset of the following form: System A Rating System B Rating 4.5 5 3 4 5 3 etc. etc. I have 155 such data points gathered using a survey. Which statistical test should I use to show statistical significance if one system…
Michael Pulis
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4
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2 answers

What is the difference between bootstrapping and sampling in reinforcement learning?

I have come across a David Silver's slide which contains both the terms "bootstrapping" and "sampling". Is there any realistic example which helps me to understand the concepts better.
James K J
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3
votes
1 answer

Why my results have time delay when I use LSTM?

I am trying to fit and test LSTM on a numeric series(like stock prices). But it seems that I always get a lag in predicted graph(Blue) with respect to real graph(red). Does anyone know why this happened? (I searched and realized this is a problem…
user3486308
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3
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1 answer

What is difference between Bayesian Networks and Belief Networks?

While reading some articles about Bayesian Networks, I came across many occurrences of Belief Networks. Do both of these terms mean the same thing or is there any difference between Bayesian Networks and Belief Networks?
Anwar Shaikh
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2
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1 answer

Feature Interactions vs Feature Importances

What are the differences between Feature Interactions and Feature Importances?
Pluviophile
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2
votes
1 answer

Which method to use to remove trend from time series?

From what I understand, differencing is necessary to remove the trend and seasonality of a time series. So I assumed it basically does the same thing as signal.detrend from the scipy library. But I tried differencing and then, separately, used…
user66036
1
vote
0 answers

What is the appropriate statistical test to compare the MAUC scores from two machine learning classifiers?

I would like to compare the scores of two multi-class classifiers. I have calculated the MAUC score for each of the algorithms, and now I want to see whether there is a statistical difference between the results. From what I have read so far, the…
ILR
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1
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1 answer

Get the average time between first and 2nd call (postgresql)

I have the following data in table where I want to calculate the average time between 1st and 2nd call. I know how to get the average, but I have a though time to figure out how to subtract the 2nd from 1st attempt since it is in the same column and…
ColRow
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