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Data Science : Recent Questions and Answers (Page 87)

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

what is the training phase in N-gram model?

Following is my understanding of N gram model used in text prediction case : Given a sentence say, " I love my " (say N = 1 /bigram), using...

Asked on 07/04/2021 by black sheep 369

1 answer

Pandas - avoid iterrows() assembling a multi-index data frame from another time-series multi-index data frame

For analyzing pairs of currencies, I have two dataframes. The first one contains information about the symbols constituting every unique pair (as in "pair metadata"): X...

Asked on 07/04/2021 by Alexander Willer

1 answer

Is there an advantage to use decision trees in OneVsAll than using "classical multiclass trees"?

I wonder if the is cases where it's better to use OneVsAll decision trees for multiclass classification ? I think that maybe it could be better for explainability of the...

Asked on 07/04/2021 by EzrielS

1 answer

Predicting point sequence in image

My training set is a set of images (either 3 channel or 1 ofc i use only one type of channel). And the labels are a sequence of points in...

Asked on 07/03/2021 by arrhhh

1 answer

Data simulation using make_classification in Python

I have a question about data simulation in Python. I deal with the classification of imbalanced data and want to test the effectiveness of different methods on simulated data. I...

Asked on 07/03/2021 by Marni

1 answer

How to cluster a set of objects each with its' own set of data?

I have a problem where I have a set of objects (say smartphones for ease of explanation). For each phone, we collected several characteristic features (such as duration of calls,...

Asked on 07/03/2021

0 answer

Using pre-trained word2vec vs re-training a word2vec model

I am relatively new to using word2vec. I am interested in solving the topic-word intrusion introduced here by using the vector spaces of words generated by word2vec...

Asked on 07/03/2021 by Niro

1 answer

Explanation on how to interpret force_plot result by using SHAP

I have applied SHAP for explaining the outcome of my neural network. For the force_plot I have obtained the following output when trying to look at multiple instances: ...

Asked on 07/03/2021

0 answer

Sales person performance prediction

I am trying to predict/forecast salesperson performance weekly, monthly, quarterly, and yearly based on the products that they sold over 3 years. As part of this effort, I grouped their...

Asked on 07/03/2021 by Optimizor

1 answer

Pytorch CrossEntropyLoss expected long but got float

have you done some research before asking the question?Yes. I have done a lot of online searching, and others had similar problems. There solution was to use...

Asked on 07/03/2021 by adrian metcalf

1 answer

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