999 search results for "MAPS"

Valentines-day full moon

February 13, 2014
By
Valentines-day full moon

Introduction A wise person told me that it will be a full moon on the upcoming Valentine’s Day, but that it will be a long time until another one. I decided to check this with astronomical calculation. Procedure The Oce package has a function called moonAngle() that returns, among other things, the illuminated fraction of the moon visible at any given...

Read more »

oce runlm function

February 11, 2014
By
oce runlm function

Introduction As was expected, the runderiv() function has been both useful and deficient. Useful because it offers a good replacement for smooth.spline() calculations of derivatives for things like N^2. And deficient because it only calculated derivatives, not values! Both an extension and a renaming were called for. The result is runlm(). Tests Below are the examples from its manpage, with...

Read more »

DailyMeteo.org – 2014 Conference

February 10, 2014
By
DailyMeteo.org – 2014 Conference

Our friend Stefan has been participating in MilanoR since the beginning, and was one of the people who started using R intensively after the "Introduction to R" Quantide course. Since he is from Belgrade (Serbia), and takes part in the … Continue reading →

Read more »

oce map projection

February 10, 2014
By
oce map projection

Introduction Soon after map projections were added to Oce, bug reports showed that coastline plots in some projections were subject to anomalous lines that run horizontally on the plot. A ad-hoc scheme was code to try to prevent this, but it does not always work. Problems are compounded for filled coastlines. I had thought this was a basic problem...

Read more »

N2 with runlm()

February 9, 2014
By
N2 with runlm()

Introduction The default swN2() calculation in Oce uses a smoothing spline. One disadvantage of this is that few readers will know how it works. A possible alternative is to compute d(rho)/dz using the slope inferred from a running-window linear regression. Such a slope is provided by the new Oce function runlm(), which is tested here. (Note...

Read more »

Plot 3D Topographic Map in R

February 7, 2014
By
Plot 3D Topographic Map in R

As we all know, there are a lot of packages provide functions to plot maps, such as ggmap, GEOmap, rworldmap and so on. For visualizing 2D topographic map, here is a good example. Besides, 3D topographic map is also easily to be plotted via some excellent functions and packages. The implement methods include but are not limited to … Continue reading...

Read more »

In case you missed it: January 2014 roundup

February 5, 2014
By

In case you missed them, here are some articles from January of particular interest to R users: Princeton’s Germán Rodríguez has published a useful “Introduction to R” guide, with a focus on linear and logistic regression. The rxDForest function in the RevoScaleR package fits random forests of histogram-binning trees. A tutorial on using the xts package to analyze and...

Read more »

Census Open Atlas Project Version Two

February 5, 2014
By
Census Open Atlas Project Version Two

This time last year I published the first version of the 2011 Census Open Atlas which comprised Output Area Level census maps for each local authority district. This turned out to be quite a popular project, and I have also extended this to Japan. The methods used to construct the atlases have now been refined,...

Read more »

“Show me the way to the next whiskey bar” (The Doors – Alabama Song) – Interactive Location Recommendation using Tableau

February 2, 2014
By
“Show me the way to the next whiskey bar” (The Doors – Alabama Song) – Interactive Location Recommendation using Tableau

Since I started using Tableau I’m quite fascinated about the capabilities of this piece of software. Before Christmas I was looking how I could build an interactive visualization that helps me to explore the relationships between different objects in a form that shows which objects are very close to each other according to some similarity measure or vice versa....

Read more »

ShareLaTeX now supports knitr

January 31, 2014
By

ShareLaTeX (click here to register a free account) is a wonderful and reliable on-line editor for writing and compiling LaTeX documents “in the cloud” as well as working together in real-time (imagine Google Docs supporting LaTeX => you get ShareLaTeX).…Read more ›

Read more »