Blog Archives

How to use optim in R

March 12, 2013
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How to use optim in R

A friend of mine asked me the other day how she could use the function optim in R to fit data. Of course there are functions for fitting data in R and I wrote about this earlier. However, she wanted to understand how to do this from scratch using optim. The function optim provides algorithms for general...

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Create an R package from a single R file with roxyPackage

March 5, 2013
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Create an R package from a single R file with roxyPackage

Documenting code can be a bit of a pain. Yet, the older (and wiser?) I get, the more I realise how important it is. When I was younger I said 'documentation is for people without talent'. Well, I am clearly loosing my talent, as I sometimes struggle to understand what I programmed years ago. Thus, anything that soothes the...

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First steps of using googleVis on shiny

February 26, 2013
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First steps of using googleVis on shiny

The guys at RStudio have done a fantastic job with shiny. It is really easy to build web apps with R using shiny. With the help of Joe Cheng from RStudio we figured out a way to make googleVis work on shiny as well. This allows you to make use of the Google Charts...

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Registration for ‘R in Insurance’ conference has opened

February 19, 2013
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Registration for ‘R in Insurance’ conference has opened

The registration for the first conference on R in Insurance on Monday 15 July 2013 at Cass Business School in London has opened. The intended audience of the conference includes both academics and practitioners who are active or interested in the applications of R in insurance. The 2013 R in Insurance conference builds...

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New Data Scientist role at Lloyd’s

February 15, 2013
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New Data Scientist role at Lloyd’s

Lloyd's of London is looking for a Data Scientist as part of the Analysis team. See Lloyd's career web site for more details.

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Review: Kölner R Meeting 6 February 2013

February 12, 2013
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Review: Kölner R Meeting 6 February 2013

The fourth Cologne R user meeting took place last Wednesday at the Institute of Sociology. Thanks to Bernd Weiß for hosting the event and Revolution Analytics for their sponsorship. We had two fantastic talks by Klaus Jacobi and M.eik Michalke. Klaus talked about Eliminating cloud pixels in satellite images via chronological interpolation and Meik presented...

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Next Kölner R User Meeting: 6 February 2013

February 5, 2013
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Next Kölner R User Meeting: 6 February 2013

Quick reminder: The next Cologne R user group meeting is scheduled for tomorrow, 6 February 2013. All details and the agenda are available on the KölnRUG Meetup site. Please sign up if you would like to come along. Notes from the last Cologne R user group meeting are available here. Thanks also to...

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Follow the ants to richness

January 29, 2013
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Follow the ants to richness

A friend of mine told me the secret of making money at the stock market. "It's easy", he said.All I would have to do is to buy a big jar of ants. Then I should observe the ants movement on my kitchen table, while following the stock market. I shall keep the ants which walk in line with...

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Reserving based on log-incremental payments in R, part III

January 22, 2013
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Reserving based on log-incremental payments in R, part III

This is the third post about Christofides' paper on Regression models based on log-incremental payments . The first post covered the fundamentals of Christofides' reserving model in sections A - F, the second focused on a more realistic example and model reduction of sections G - K. Today's post will wrap up the paper with sections...

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Reserving based on log-incremental payments in R, part II

January 15, 2013
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Reserving based on log-incremental payments in R, part II

Following on from last week's post I will continue to go through the paper Regression models based on log-incremental payments by Stavros Christofides . In the previous post I introduced the model from the first 15 pages up to section F. Today I will progress with sections G to K which illustrate the model with a...

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