Sunday, February 6, 2022

Interest in Amazon

1. Web Search

2. Amazon Share Price Chart


The above charts show the trends/data from the last 90 days. Automatically Updated Daily!

Interest in Facebook (Meta)

1. Web Search

2. Facebook(Meta) Share Price Chart


The above charts show the trends/data from the last 90 days. Automatically Updated Daily!

Saturday, February 5, 2022

Classification of Data Science Problems - A perspective

Data ProblemsWe all want to be an expert in Data Science. So, how do you become one?
Start with at least the knowledge of broad categories of Data Science Problems. No, I'm not talking about the much hyped ML/AI discipline. Let's stick with Data Science.

Number One:
                      Let's say you have historical nos. of any point of interest(Sales/Orders/Temperature/...), and you want to forecast its future value. This my friend falls in the class of Time series forecasting problem. You could use ARMA/ARIMA/SARIMA models or go for LSTM if you like ML models. Of course, the solution set I listed is not exhaustive, you could use many kinds of approaches for Time series forecasting.

Number Two:
                      Now, let's say you have two non-time series features or (variables of interest), and you want to find their association or interrelationship; you can resort to correlation analysis. 

Number Three:
                         Extending the problem category two, let's now move to find the dependence of a variable on set of other features/variables (or just one feature); here you can try any of the regression techniques.

Number Four:
                       Modifying the problem three, let's say you are interested in Yes/No or True/False or Present/Absent kinds of answers, you my friend need any of the classification models. You could take the help of Logistic Regression.

Number Five & Beyond:
                                        Now, that we have covered all usual suspects, we need to discuss the cutting edge ML/AI problems known as RL (Reinforcement Learning) or Unsupervised/Semi-supervised learning methods. These are more fuzzy & unstructured than the previous problems