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Data Science : Recent Questions and Answers (Page 97)

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

How to Implement a Custom Loss Function with Keras for a Sparse Dataset

My dataset is composed of an idle system that, at some time instants, receives requests. I'm trying to predict these instants through a clock. Since the requests are sparsely distributed...

Asked on 06/24/2021 by Philippe Fanaro

1 answer

True Negatives for Named Entity Recognition

Are True Negatives always zero for a Named Entity Recognition task because TN in NER would mean a not entity being classified as Not entity? Actual Entity[Microsoft Corp.] CEO...

Asked on 06/24/2021

1 answer

How to calculate date range constrained average Lifetime Value within Data Studio?

So within a data studio dashboard, I have a number of metrics e.g. Total Orders, Total Sales, Average order value etc. with YoY indicators as shown below: ...

Asked on 06/23/2021

0 answer

Database augmentation using Sobel filter (aka gradient)

I'm working in PyTorch and to improve a ProGAN training I'm augmenting a database by calculating, for each image, the horizontal and vertical gradient via the Sobel...

Asked on 06/23/2021 by albus_c

0 answer

Similarity between 2 statistical distributions

Is there any index that measures similarity between 2 gaussian distributions of 1-D data (may have slightly different number of points) considering their mean shift, variance shift, difference in shapes(like...

Asked on 06/23/2021

1 answer

Download weather data from a http directory

This link contains weather data with a lot of folders and subfolders. I need to download as a whole without visiting every file inside the folders. https://www.ncei.noaa.gov/data/global-forecast-system/access/historical/analysis/...

Asked on 06/23/2021 by Suresh Pokharel

0 answer

What is the input of LSTM network?

Hello I am trying to understand LSTMs but have a few problems:What is the input? Since LSTM is seq2seq I would think it is a sequence of words, but in...

Asked on 06/23/2021 by Tknoobs

1 answer

Does it make sense to use train_test_split and cross-validation when using GridSearchCV to play with hyperparameters?

I was wondering if my methodology makes sense. I am using GridSearchCV with cross-validation to train and tune model hyperparameters for a bunch of different model types (e.g. Regression Trees,...

Asked on 06/23/2021

2 answer

plot multiple strings from a dataframe

I am trying to read and plot several files which looks like as below when I open with python using pandas read.table. The columns to plot are "dev" vs timestamp....

Asked on 06/23/2021 by lucia

2 answer

Anomaly detection for time series data with only positive samples?

I'm having a time series ECG dataset. I want to do anomaly detection (anything different from normal ECG should be abnormal). The point is I'm having only positive samples with...

Asked on 06/22/2021 by ashukid

1 answer

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