Building Financial Stock Scanner with Ruby on Rails and R. Part 18. Prawns but not the seafood type ones.

Remember that in the Part 1 we established that one of the requirements of our application is to be able access reports on the home network as well as on the Internet.

We have mostly covered the first half. Now let’s talk how can we access reports through the Internet.

For that we need to add prawns to our cocktail of Ruby/Rails/R/Quantmod and Javascript ingredients.

Continue reading “Building Financial Stock Scanner with Ruby on Rails and R. Part 18. Prawns but not the seafood type ones.”

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Building Financial Stock Scanner with Ruby on Rails and R. Part 18. Prawns but not the seafood type ones.

Building Financial Stock Scanner with Ruby on Rails and R. Part 16. “I see only forms that are lit up and forms that are not”. (Francisco de Goya)

Let’s update our web site with an ability to add/edit/delete lists of stock tickers.

Continue reading “Building Financial Stock Scanner with Ruby on Rails and R. Part 16. “I see only forms that are lit up and forms that are not”. (Francisco de Goya)”

Building Financial Stock Scanner with Ruby on Rails and R. Part 16. “I see only forms that are lit up and forms that are not”. (Francisco de Goya)

Building Financial Stock Scanner with Ruby on Rails and R. Part 14. The less is more.

For the past few posts we have been optimising charts generation execution. There are two more things to do before we continue with the next topic. Continue reading “Building Financial Stock Scanner with Ruby on Rails and R. Part 14. The less is more.”

Building Financial Stock Scanner with Ruby on Rails and R. Part 14. The less is more.

Building Financial Stock Scanner with Ruby on Rails and R. Part 13. Parallel Processing. “We are one, but we are many…”

In this post we explore an option for asynchronous / parallel execution of the R/Quantmod/Ruby charts generation batch job. The quote in the title, is, actually from a song (used in this ad for an Australian telecom company Telstra). Taken out of the context it can represent a ‘fork()’ call, and, thus, somewhat related to the subject.
Continue reading “Building Financial Stock Scanner with Ruby on Rails and R. Part 13. Parallel Processing. “We are one, but we are many…””

Building Financial Stock Scanner with Ruby on Rails and R. Part 13. Parallel Processing. “We are one, but we are many…”

Building Financial Stock Scanner with Ruby on Rails and R. Part 12. Need4Speed.

In this post we will continue our quest to improve performance of the charts generation batch job. We will take the further clues provided by the TRIZ analysis in the previous post, implement some of them and measure the end result against the original, baseline, performance results.
Continue reading “Building Financial Stock Scanner with Ruby on Rails and R. Part 12. Need4Speed.”

Building Financial Stock Scanner with Ruby on Rails and R. Part 12. Need4Speed.