Let’s use some French regions polygons and attribute one colour to each region. I like piratepal colours of library yarrr. […] To create the doughnuts using original and buffer polygons, I used st_difference. However as discussed with edzer in the sf github repository, I had to transform the …
How to fill a hatched area polygon with holes in leaflet with R
I built a R package, available on my statnmap github, to provide the function hatched.SpatialPolygons. This function is based on the plot method for SpatialPolygons of library sp. I modified the functions and sub-functions to remove all code for direct drawing and allow to output a …
Plot a specific image in a delimited polygon as repeated pattern on a map
##Plot an image pattern in a delimited polygon […] Let us define a SpatialPolygonsDataFrame to work on. Let’s also define the specific polygon in which to draw the forest. […] ###Draw a point grid with emoji in a specific polygon We can sample points in the polygon area using …
Format text conditionally with rmarkdown chunks - Complete iframed article
The following of this article is an embed iframe. As it was built for my previous website, the links inside may not work, in particular the summary. Sorry for that. Related article in the blog is here
Rmarkdown conditional chunks to create multilingual pdf and html with images
In the upper output files, I list some of the tips I have to use to make this work and some bonus: […] I will modify this list if I face new difficulties or I find better ways to do things. […] The complete list of tips can be seen on the following web pages (embedded in iframes). Rmd …
Add multiple layers in leaflet widget with R
Library leaflet with R is well integrated with pipe writing (%>%). Thus, it is really easy to add multiple layers and options in a leaflet widget. If you want to add a lot of layers in your widget, it is not necessary to provide a “addPolygons” for each of these layers, you can simply use a loop. …
Rshiny expert image comparison app
The expert image comparison was long: 40min for the small analysis and 3h for the complete one. As the shinyapp is freely hosted on the Rstudio shinyapps.io servers, it was not possible to save outputs of a specific session on the server. Thus, the web application has been built such that the …
A nice RShiny On/Off switch button
[…] This Rshiny ‘SwitchButton’ function allows to use nice on/off (or True/False) switch buttons instead of the default Rshiny ‘checkboxInput’ function. This only uses CSS code and does not make use of javascript. The ‘switchButton’ function includes two options: […] Steps to include …
Bayesian life cycle model: OpenBUGS code
The OpenBUGS code presented below is the additional material of a publication. This is the life cycle model of a marine species (the sole in the Eastern Channel). The Bayesian hierarchical model incorporates indices of juvenile spatialized abundance, larval dispersion, adult abundance indices and …
Mapping, spatial analyses and GIS with R
If you download the following presentation, you will find a presentation of different functions in the R-software useful for spatial data manipulations. Choosing the right libraries allows to create, import, modify, manipulate and map vector (shapefiles) or matrix (raster) spatial data. Your spatial …