Articles by Lauro Silva

Big Data Manipulation in R Exercises

June 9, 2017 | Lauro Silva

Some times it is necessary to download really big csv files to deliver some analysis. When you hit file sizes in Gigabytes it is useful to use R instead of spreadsheets. This exercise teaches us to manipulate this kind of files. Answers to the exercises are available here. Exercise 1 Create ... [Read more...]

Canada Labour Market: Future Perspectives

June 1, 2017 | Lauro Silva

For anyone looking for job opportunities, it is nice to have an idea how the job market will perform in the future for your chosen career or industry. Many countries have open data sets that offer this kind of data. In these exercises we will use R to analyze the ... [Read more...]

Canada Immigration: Where to settle in? Exercises

May 26, 2017 | Lauro Silva

Many people around the globe would like to immigrate to Canada as a Skilled Worker. These candidates must prove language proficiency in French and English, at least 2 years of working experience after graduation, and more. But, many immigrants that arrive in canada face unemployment rates sometimes even higher than in ... [Read more...]

Data Science for Operational Excellence (Part-5)

May 3, 2017 | Lauro Silva

Operations need to have demand forecasts in order to establish optimal resource allocation policies. But, when we make predictions the only thing that we assure is the occurrence of prediction errors. Fortunately, there is no need to be 100% accurate to succeed, we just need to perform better than our competitors. ... [Read more...]

Data Science for Operational Excellence (Part-4)

April 27, 2017 | Lauro Silva

Suppose your friend is a restaurant chain owner (only 3 units) facing some competitors challenges related to low price, lets call it a price war. Inside his business he knows that there’s no much cost to be cut. But, he thinks that, maybe if he tries harder to find better ... [Read more...]

Data Science for Operational Excellence (Part-3)

April 24, 2017 | Lauro Silva

Optimized transportation planning is a task usually left to the firm’s logistic department. However, it is often difficult to visualize, specially if there are many points involved in the logistic network. R and its packages can help solving this issue. Our goal here is to expand logistics networking visualization. ... [Read more...]

Data Science for Operational Excellence (Part-1)

April 6, 2017 | Lauro Silva

 R has many powerful libraries to handle operations research. This exercise tries to demonstrate a few basic functionality of R while dealing with linear programming. Linear programming is a technique for the optimization of a linear objective function, subject to linear equality and linear inequality constraints. The lpsolve package in ... [Read more...]

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