In this blog article, I propose a way to look at the spatial repartition of correlation between two rasters. This is an update of a blog post I wrote in 2018 : Spatial correlation between rasters. The main difference is that I use the new {terra} package instead of the old {raster} package. The …
Spatial
Add {tmap} point layer with multiple symbol border colors and width
It’s been a while since my last blog post. Indeed, my free time is used to improve packages like “{fusen}: Inflate your package from a simple flat Rmd” , “{attachment}: Tools to deal with dependencies in scripts, Rmd and packages” or “{gitlabr}: An R client for the GitLab API”. Hence, drawing some …
Buffer areas for nearest neighbours or national marine areas delineation
A few weeks ago, Christina Buelow asked on Twitter how she could create the polygons of coastal waters using the land polygons, and making sure there is no overlap in buffer areas. This would make it possible to know which land area is closest to any place in the sea. Let’s explore what solution …
Find most retweeted tweets of the #rspatial bot
Bots that retweet #rspatial and #BioImageAnalysis tweets are working well. It is now time to add a little functionnality with the best retweeted tweet of the month, a function added to {tweetrbot} package. […] You can retrieve the updated dataset for all tweets here and the dataset for the …
#30DayMapChallenge: 30 days building maps (3) - Earth is spherical
The #30DayMapChallenge was initiated by Topi Tjukanov on Twitter. This is open to anyone who would like to show a map, whatever the software is. In this blog post, I will show maps made with R. I add constraints to myself for fun. This week, I will create maps that remind map makers that Earth is …
#30DayMapChallenge: 30 days building maps (2) - tmap
The #30DayMapChallenge was initiated by Topi Tjukanov on Twitter. This is open to anyone who would like to show a map, whatever the software is. In this blog post, I will show maps made with R. I add constraints to myself for fun. This week, I will use {tmap} to create maps. This follows previous …
#30DayMapChallenge: 30 days building maps (1) - ggplot2
The #30DayMapChallenge was initiated by Topi Tjukanov on Twitter. This is open to anyone who would like to show a map, whatever the software is. In this blog post, I will show maps made with R. I add constraints to myself for fun. This week, I will use {ggplot2} to create maps. […] […] …
Follow moving particle trajectory over raster with {rayshader}
{rayshader} is a fantastic package for 3D mapping, but it comes with the limitations of {rgl}. I always found it a shame not being able to travel in all directions over my 3D objects. In this blog post, I will show a trick to simulate particle trajectory in 3 dimensions like in a “first person” …
Create a twitter bot on a Raspberry Pi 3 using R
With Marion Louveaux, we decided that we had to build a Twitter bot for our preferred hashtag. We explored different possibilities but truth is I couldn’t resist building it using R and {rtweet}. Here are the steps I used to set up a Twitter bot on my Raspberry Pi. […] I use package {rtweet} …
Render mesh3d objects with rayshader and rayrender
People like to show 3D images in their presentations because it usually impresses the audience. Does it really ? I do not care ! I am just looking for an opportunity to play with some 3D images… This blog post is a detailed version of some 3D images shown during my presentation “Everything but maps …
Kaggle survey 2018: Maps of programming languages used and repartition of reproducibility issues
Last year I participated to the Kaggle survey data challenge. The challenge objective: tell a data story about a subset of the data science community represented in this survey, through a combination of both narrative text and data exploration. I used this opportunity to build ternary choropleth …
Play with spatial tools on 3D cells images
Let’s play with mapping tools on non-maps data ! {rayshader} is nice on raster maps, but what about using it on segmentized plant cell? […] I wanted to find a good reason to play with Tyler Morgan-Wall packages for 3D visualisation of raster data: {rayshader} and {rayfocus}. Using cell …
Introduction to mapping with {sf} & Co.
At the “Rencontres R 2018” in Rennes, I proposed a brief introduction to mapping using the recent {sf} package and some other interesting packages. This blog post is an extended version of my presentation allowing me to share the code of the different maps that appeared on it. It’s still a brief …
Draw maps like paintings
On the Grrr Slack, a mutual-aid Slack on R for French speaking people, Thomas Vroylandt showed the following maps asking how this could be done using {ggplot2} : EDIT : This maps was originally presented on visionscarto.net with drawings by Agnès Stienne […] As of today (2018-04-18): …
Spatial correlation between rasters
In this blog article, I propose a way to look at the spatial repartition of correlation between two rasters. For your own reason, you may want to know the correlation between rasters, but a unique value issued from fonction cor is not enough. You would like to know if there are variations of …