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Data Science : Recent Questions and Answers (Page 282)

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

How to evenly distribute data to multiple GPUs using Keras

I am using Keras=2.3.1 with Tensorflow-gpu=2.0.0 backend. While I trained model on two RTX 2080 ti 11G GPUs, it allocates all data to '/gpu:0',and nothing changed with '/gpu:1'. Surely, the...

Asked on 12/15/2020 by fengxu

1 answer

what is label shift?

I'm studying a paper about Named Entity Recognition. The following is a part of the abstract:To assess the robustness of NER systems, we propose an evaluation method that focuses on...

Asked on 12/14/2020 by Marzi Heidari

1 answer

How to use Variational Autoencoder's μ and σ with user-generated z?

My understanding of VAE is that unlike Autoencoders, it does not directly give you a discrete encoding (latent code vectors n-dim) instead, it gives you both mu and sigma (n-...

Asked on 12/14/2020 by unsure_automata

1 answer

Different results for LogisticRegression on python 2.7 and 3

I have different results for the same kernel on python 2.7 (local machine) and python3 (the system running on kaggle) for LogisticRegression. How it is possible? Here my results from...

Asked on 12/14/2020 by Mutatos

2 answer

When to One-Hot encode categorical data when following Crisp-DM

I have a dataset that contains 15 categorical features (2 and 3 level factors which are non-ordinal) and 3 continuous numeric features. Seeing as most machine learning algorithms require numerical...

Asked on 12/14/2020 by kjtheron

1 answer

Cannot fig out error in my gradient function implementation in python

Im trying to implement following gradient descent function in Python for logistic regression: $∇θ(−logL)=−X^T ?(y−e^{Xθ}?)$ This is my python implementation:def gradient(X, y, theta): ...

Asked on 12/14/2020 by Gaurang Swarge

1 answer

Minimizing error on unseen data

The classifier aims to minimize the loss function (($F(x)$ - $hat{F}(x)$)2), where $F(x)$ is unknown function and $hat{F}(x)$ is the predicted function. If $F(x)$ is...

Asked on 12/14/2020

2 answer

Keras mnist.load_data() unshuffled?

I want to do some data augmentation on MNIST and therefore must manually label the Y set. This can be automated if MNIST is unshuffled, however mnist.load_data() appears to be...

Asked on 12/14/2020 by user4779

1 answer

What are the alternatives to Python + Spark (pyspark)?

I like Python, and I like Spark, but they don't fit very well together. In particular,it is very hard to use python functions in spark (have to create JVM...

Asked on 12/14/2020 by stackoverflower

2 answer

NER and context mapping

I want to extract various amounts and tenure of contracts from different contract documents that we have. For example : Mr xyz, this contact is valid for 3 Months and...

Asked on 12/14/2020 by SKB

1 answer

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