Blog Archives

Updating MetaLandSim…

August 2, 2019
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Updating MetaLandSim…

A new development version is know available for the package MetaLandSim (v. 1.0.6). It can be downloaded from GitHub. The user has to run the following code in order to install the package from GitHub: library(devtools) install_github(“FMestre1/MetaLandSim”) These changes were required because of recent improvements made to the package rgrass7 (which allows to work on … Continue reading Updating...

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How many downloads does my package have?

April 7, 2019
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How many downloads does my package have?

Everyone that authors an R package is curious about how many users download it. As far as I know there’s still no way to get information on all the downloads, from all the R mirrors. Here I’m using package cranlogs, which only gives information on the downloads from the R Studio mirror. It also does … Continue reading How...

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Simulating metapopulation occupation in a landscape

April 3, 2019
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Simulating metapopulation occupation in a landscape

The objective of this post is to go into the inner workings of the package MetaLandSim, which I developed a few years ago. MetaLandSim’s main objectives are to i) simulate the occupation of an habitat network suffering some sort of change (but static landscapes work too); ii) simulate range expansion by a species with a … Continue reading Simulating...

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Package lconnect: patch connectivity metrics and patch prioritization

March 20, 2019
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Package lconnect: patch connectivity metrics and patch prioritization

Today we are presenting a new package, lconnect. This package is intended to be a very simple approach to derive landscape connectivity metrics. Many of these metrics come from the interpretation of landscape as graphs. Additionally, it also provides a function to prioritize landscape patches based on their contribution to the overall landscape connectivity. For now … Continue reading Package...

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Individual patch connectivity

February 27, 2019
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Individual patch connectivity

Answering questions from users is actually a good way to find potentially interesting things to post… With the obvious advantage that other people might find it useful too! So… let’s start… This MetaLandSim user wanted a way to derive the contribution of each individual patch to overall landscape connectivity. Here I used the method presented … Continue reading Individual...

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Creating landscapes and simulating species occupation with MetaLandSim

February 23, 2019
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Creating landscapes and simulating species occupation with MetaLandSim

MetaLandSim is an R package I’ve developed to simulate metapopulational dynamics on an habitat network. It also computes a lot of landscape connectivity metrics and simulates range expansion (check the manual if you are interested). I’ve mentioned it here frequently, and sometimes I like to post a simple script that I used to answer a … Continue reading Creating...

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From MetaLandSim to igraph and back!

November 15, 2018
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From MetaLandSim to igraph and back!

One of these days I got an email about converting MetaLandSim objects to igraph (or the other way around). One of the reasons I did not use igraph in the first place (leading me to develop MetaLandSim) was that I needed my nodes (the vertexes, using igraph nomenclature) to have fixed positions. These were, after … Continue reading From...

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New MetaLandSim version (1.0.5)!

November 4, 2018
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New MetaLandSim version (1.0.5)!

A new version of MetaLandSim is now available at the CRAN webpage. This update was needed because another package, from which MetaLandSim depends, changed a function used by this package causing it to malfunction.

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Package gDefrag now on CRAN!

July 12, 2018
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The package gDefrag, by F. Mestre, F. Ascensão and A.M. Barbosa is now on CRAN. This is an excellent tool to prioritize the landscape de-fragmentation process. It works by prioritizing the different sections of linear infrastructures (e.g. roads, pow...

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New MetaLandSim version (1.0.4) just out!

June 17, 2018
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The version that was only available through GitHub is now also on CRAN. This new version corrects some minor bugs in the code. Available here.

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