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Data Science : Recent Questions and Answers (Page 62)

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

How to resize image along with their mask?

I have original images of the size 1935x1481. I am using labelme to annotate the images. I am creating polygons on the original image. Is there a way to resize...

Asked on 08/03/2021 by Monal Kumar

1 answer

Which data sets would help to predict (exponential) market trends?

Which kind of datasets do websites such as MeetGlimpse, trends.co, explodingtopics.com use to detect exponential market trends? I love them (not...

Asked on 08/03/2021

1 answer

Classifying Data in Orange: What's the difference between 'Features', 'Target Variables', and 'Meta Attributes'

I've been looking for a more visual way to calculate statics on my spectroscopy data. Python's Orange Canvas seems like it might be a great alternative to Pipeline Pilot,...

Asked on 08/02/2021

2 answer

Do Activation Functions map to Higher Dimensions?:

I just started learning tensorflow and I have a question regarding activation functions used in neural networks, I watched a 3b1b video a while ago and it seems it squished...

Asked on 08/02/2021

1 answer

how to describe a decrease in sales

Hypothetically, if your company's sales had dropped significantly in 2020, what approach would you take to describe the cause? can you build a model to predict the decrease (between 2019...

Asked on 08/02/2021

0 answer

Learning affinity among features

A batch of semantic objects in the image (lesions in CT scans) are represented in feature space, $X_{B times C}$. I want to represent the whole batch in a...

Asked on 08/02/2021

0 answer

Bad classification performance of logistic regression on imbalanced data in testing as compared to training

I am trying to fit a logistic regression model to an imbalanced dataset (0.5/99.5) with high dimensionality(about 15k). I used random forest to select top 200 important features. Observations are...

Asked on 08/02/2021

4 answer

What if My Word is not in Bert model vocabulary?

I am doing NER using Bert Model. I have encountered some words in my datasets which is not a part of bert vocabulary and i am getting the same error...

Asked on 08/02/2021

1 answer

Definition of the Q* function in reinforcement learning

I'm making my way through Sutton's Introduction to Reinforcement Learning. He gives the definition of the $q_*$ function as follows $$q_*(a) = mathbf{E}[R_t | A_t = a]...

Asked on 08/02/2021 by marlineer43

1 answer

How to interpret feature importance in text classification using Fasttext?

Once the text is converted into a vector of size(1,100), how can we interpret and backtrace a word's importance which helped in classification?...

Asked on 08/02/2021

0 answer

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