Publications by Peter Prevos
Digit fifth powers: Euler Problem 30
Euler problem 30 is another number crunching problem that deals with numbers to the power of five. Two other Euler problems dealt with raising numbers to a power. The previous problem looked at permutations of powers and problem 16 asks for the sum of the digits of . Numberphile has a nice video about a trick to quickly calculate the fifth root ...
1693 sym R (299 sym/1 pcs) 18 img
Digit fifth powers: Euler Problem 30
Euler problem 30 is another number crunching problem that deals with numbers to the power of five. Two other Euler problems dealt with raising numbers to a power. The previous problem looked at permutations of powers and problem 16 asks for the sum of the digits of . Numberphile has a nice video about a trick to quickly calculate the fifth root ...
1693 sym R (299 sym/1 pcs) 18 img
Pacific Island Hopping using R and iGraph
Last month I enjoyed a relaxing holiday in the tropical paradise of Vanuatu. One rainy day I contemplated how to go island hopping across the Pacific ocean visiting as many island nations as possible. The Pacific ocean is a massive body of water between, Asia and the Americas, which covers almost half the surface of the earth. The southern Pacifi...
3229 sym R (2265 sym/3 pcs) 6 img
Pacific Island Hopping using R and iGraph
Last month I enjoyed a relaxing holiday in the tropical paradise of Vanuatu. One rainy day I contemplated how to go island hopping across the Pacific ocean visiting as many island nations as possible. The Pacific ocean is a massive body of water between, Asia and the Americas, which covers almost half the surface of the earth. The southern Pacifi...
3229 sym R (2265 sym/3 pcs) 6 img
Analysing soil moisture data in NetCDF format with the ncdf4 library
The netCDF format is popular in sciences that analyse sequential spatial data. It is a self-describing, machine-independent data format for creating, accessing and sharing array-oriented information. The netCDF format provides spatial time-series such as meteorological or environmental data. This article shows how to visualise and analyse thi...
3452 sym R (1647 sym/4 pcs) 8 img
Analysing soil moisture data in NetCDF format with the ncdf4 library
The netCDF format is popular in sciences that analyse sequential spatial data. It is a self-describing, machine-independent data format for creating, accessing and sharing array-oriented information. The netCDF format provides spatial time-series such as meteorological or environmental data. This article shows how to visualise and analyse thi...
3452 sym R (1647 sym/4 pcs) 8 img
Pandigital Products: Euler Problem 32
Euler Problem 32 returns to pandigital numbers, which are numbers that contain one of each digit. Like so many of the Euler Problems, these numbers serve no practical purpose whatsoever, other than some entertainment value. You can find all pandigital numbers in base-10 in the Online Encyclopedia of Interegers (A050278). The Numberhile video expl...
2296 sym R (642 sym/1 pcs)
Pandigital Products: Euler Problem 32
Euler Problem 32 returns to pandigital numbers, which are numbers that contain one of each digit. Like so many of the Euler Problems, these numbers serve no practical purpose whatsoever, other than some entertainment value. You can find all pandigital numbers in base-10 in the Online Encyclopedia of Interegers (A050278). The Numberhile video expl...
2296 sym R (642 sym/1 pcs)
Writing academic articles using R Sweave and LaTeX
One of my favourite activities in R is using Markdown to create business reports. Most of my work I export to MS Word to communicate analytical results with my colleagues. For my academic work and eBooks, I prefer LaTeX to produce great typography. This article explains how to write academic articles and essays combining R Sweave and LaTeX. The...
3046 sym R (504 sym/1 pcs) 4 img
Writing academic articles using R Markdown and LaTeX
One of my favourite activities in R is using Markdown to create business reports. Most of my work I export to MS Word to communicate analytical results with my colleagues. For my academic work and eBooks, I prefer LaTeX to produce great typography. This article explains how to write academic articles and essays combining R Markdown and LaTeX. T...
3065 sym R (504 sym/1 pcs) 4 img