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Data Science : Recent Questions and Answers (Page 279)

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

Decomposing R squared or VIF

In the context of multi-regression, I am wondering if there is a way to decompose $$VIF_i = 1/(1-R_i^2)$$ where $R_i^2$ is the r squared obtained from the regression of dependent...

Asked on 12/17/2020 by Jun Jang

1 answer

Finding relationships between multiple readings from an IoT sensor network time-series data

I am trying to find possible relationships between a large sensor network (around 100 sensors) where data is recorded in daily intervals. Each sensor has multiple readings simultaneously (Value_X). Each...

Asked on 12/17/2020 by Prabath

0 answer

Missing population values in census data

I have population data from Census.gov: Total US population by age by year from 1940 through 2010 Depending on the range of decades, the data is missing discrete population values...

Asked on 12/17/2020 by Threadid

1 answer

HR employee attrition modeling - making a balanced sample question

I have dataset 1 (stayers) consisting of 1500 record of HR data demographic data of employees (11 features) who currently are in the company. Dataset 2 (leavers) contains 180 records...

Asked on 12/16/2020 by Nimrod Ets

0 answer

Sample Space of Longest Run

I am trying to find a way to calculate all possible combinations of a sequence that have a certain length of long run. When answering questions regarding sequences of heads...

Asked on 12/16/2020 by A.May

1 answer

When to choose character instead of factor in R?

I am currently working on a dataset which contains a name attribute, which stands for a person's first name. After reading the csv file with read.csv, the variable is a...

Asked on 12/16/2020 by lupi5

2 answer

Reporting descriptive statistics in case of missing data

I have a dataset of survey responses with 10 variables. 4 of them were optional questions during the survey. Now for ~900 participants, I have missing values for the 4...

Asked on 12/16/2020 by Jishan

0 answer

Hyperparameter search for LSTM-RNN using Keras (Python)

From Keras RNN Tutorial: "RNNs are tricky. Choice of batch size is important, choice of loss and optimizer is critical, etc. Some configurations won't converge." So this is more a...

Asked on 12/16/2020 by wacax

4 answer

Product classification according to description

I have some products, along with their description. I wish to assign USPSC code to each product. I have a really basic doubt here. What exactly is my test file...

Asked on 12/16/2020 by huy

1 answer

How to choose appropriate epsilon value while approximating gradients to check training?

While approximating gradients, using actual epsilon to shift the weights results in wildly big gradient approximations, as the "width" of the used approximation triangle is disporportionately small. In ...

Asked on 12/16/2020 by David Tóth

0 answer

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