Popular articles by boryana

Popular comments by boryana


I really like that the whole process of modelling is backed up by sound business logics. I find that your approach of incorporating exogenous features such as data on relevant stocks and Google trends adds a significant extent of originality in the adopted research methodology.
Data prep is conducted in compliance with the core theoretical requirements.
The implementation of rolling sample is correct.
What I would like to advise on the model is to consider statistical significance, especially for the estimates associated with the exogenous explanatory variables. Also, looking at the plot of actual vs predicted 1-step-ahead data, I might state that the model captures really tightly the series volatility for the first 12 000 observations. In order to tune better the model you might consider the reason behind the deteriorated performance aftermath. Once again, my suggestion is to inspect how statistical significance of delivered estimates changes over time.
Congrets on reporting the figure of directional symmetry!
Also, I really like the way your workflow is organized taking advantage of both R and Python utilizing the one that is best suited to the research task at hand.
Great job, guys!

Datathon Sofia Air Solution – Team Duckelicious Case Telelink

Working with data for 2018 only is a good solution so as to deliver more quickly consistent representation. Also, focusing on one main station is a good choice with respect to the timing of the task. I like the presented maps. I would like to see at least part of your code.

DAB PANDA: The A.I. Crypto Trader

I really like the way you’ve presented results. With RPubs everything is clearly outlined and the reader might follow easily the exhibition of major research steps backed up by the relevant code.
The data prep is conducted correctly. The applied methodology is appealing from theoretical point of view. The sliding window approach is correctly implemented. Considering the issue with computational efficiency, I might say that application the classical Box-Jenkins approach is a good choice.
Obviously, if you had two more hours, you would have accomplished in the same brilliant way (just as all previous sections) the last portion of your research including more comments on the accuracy and robustness of delivered forecasts.
Last, but not least, I would like to emphasize that the text of the article is written in a really nice manner, approaching the reader and dragging with the very first paragraph their attention.
In conclusion I might say that it is a great job, guys!

Datathon Sofia Air Solution – Telelink Case Solution

Hi, guys, good job!

Business Understanding: the text is relevant and the research objectives are stated clearly.

Data Understanding: I like very much application of heatmaps so as to visualize the air pollution information contained in the citizen’s data set. You’ve did a good analysis on the issues related to the data in the set with official measurements. Yet, pay attention that citizen’s dataset spans from 2017 to 2018. Therefore, taking years 2013-2016 as training set and 2017-2018 as a test set would work only if you are to predict air pollution at the main stations. However, the objective is to deliver forecasts for citizen stations.

Including a section on future improvements and a list of references is an advantage.