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Data Science : Recent Questions and Answers (Page 218)

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

Plotting clustered sentences in Python

I have the following three sentences, extracted from a dataframe. I would like to check the similarity and create clusters based on their level of similarity. Authors ...

Asked on 02/13/2021

1 answer

A question about dual representations, kernels and notations used in Bishop's book

I'm having hard times about kernel functions and dual representations on 'Pattern recognition from and machine learning' by Bishop. Here it is the page I'm trying to understand:...

Asked on 02/13/2021

0 answer

SMOTE for multi-instance learning i.e num_rows(x_train) > num_rows(y_train)

I have an imbalanced dataset and I wish to predict classes(0 or 1). Sample x_train:id date c1 c2...

Asked on 02/13/2021 by yamini goel

1 answer

Is the first Linear layer in Pytorch considered as the input layer?

For example: nn.Linear(100,50) You have 100 input features and 50 outputs. Would this be considered as the input layer or already as a kind of second layer? The problem: I...

Asked on 02/13/2021

0 answer

Policy Gradient not "learning"

I'm attempting to implement the policy gradient taken from the "Hands-On Machine Learning" book by Geron, which can be found here. The notebook uses Tensorflow and I'm...

Asked on 02/13/2021 by Harpal

1 answer

Heuristics in A* algorithm

I am trying to implement the A* algorithm into a graph I have, but I'm not sure if I am doing it properly. So basically I have some nodes and...

Asked on 02/13/2021

0 answer

How could a neural network classifer for multilclass problem classify only in one class when a decision tree is more balanced and accurate?

I want to create a classifier for a data frame that has four classes. Each line can only have one class. I have two predictive models: a neural network and...

Asked on 02/12/2021

1 answer

SymbolicException: Inputs to eager execution function cannot be Keras symbolic tensors

I am writing Encoder-Decoder architecture with Bahdanau Attention using tf.keras with TensorFlow 2.0. Below is my code This is working with TensorFlow 1.15 but getting the error in 2.0. you...

Asked on 02/12/2021 by Uday

1 answer

What do graphs of signal vs background neural network outputs represent?

For example, this image shows the output of a neural network I assume but I am not sure how the output...

Asked on 02/12/2021 by bigb123

1 answer

Spatially constrained geospatial similarity

What's the current methodology for clustering geospatial data by features? Example: I have some demographic dataset. Let's say this contains average home price and population density. So, an example correlation...

Asked on 02/12/2021 by Overflow2341313

1 answer

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