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mlampros Organizing and Sharing thoughts, Receiving constructive feedback

Functionality of the fastGLCM R package

This blog post is a slight modification of the R package Vignette and shows how to use the Rcpp Armadillo version of the fastGLCM R package. The fastGLCM R package is an RcppArmadillo implementation of the Python Code for Fast Gray-Level Co-Occurrence Matrix by numpy,

The python version works similarly and is included as an R6 class (see the documentation of fastglcm). However, it requires a python configuration in the user’s operating system and additionally the installation of the reticulate R package.


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Variational Mode Decomposition (VMD) using R

This blog post is a slight modification of the R package Vignette. The VMDecomp R package is an RcppArmadillo implementation of the Matlab Code for Variational Mode Decomposition (1- and 2-dimensional) based on the papers,

  • “Variational Mode Decomposition” by K. Dragomiretskiy and D. Zosso in IEEE Transactions on Signal Processing, vol. 62, no. 3, pp. 531-544, Feb.1, 2014, https://doi.org/10.1109/TSP.2013.2288675
  • “Two-Dimensional Variational Mode Decomposition” by Dragomiretskiy, K., Zosso, D. (2015), In: Tai, XC., Bae, E., Chan, T.F., Lysaker, M. (eds) Energy Minimization Methods in Computer Vision and Pattern Recognition. EMMCVPR 2015. Lecture Notes in Computer Science, vol 8932. Springer, https://dx.doi.org/10.1007/978-3-319-14612-6_15

The Matlab code is available to download in the Author’s website (https://math.montana.edu/dzosso/code/).


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ICESat-2 Altimeter Data using R

This blog post (which is a slight modification of both package Vignettes) explains the functionality of the IceSat2R R package and shows how to use the OpenAltimetry API from within R. It consists of three parts,

  • OpenAltimetry
  • IceSat-2 Mission Orbits
  • IceSat-2 Atlas Products

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Norway's International Climate and Forest Initiative (NICFI) using Planet Satellite Imagery in R

In this blog post I’ll explain the functionality of the PlanetNICFI R package based on a change detection use case. The official website of NICFI (Norway’s International Climate and Forest Initiative) includes all the details about the initiative against global deforestation. This initiative was also covered extensively on the web especially from the provider of the free Satellite Imagery. Users have the opportunity to download high-resolution imagery of forests globally using a simple sign up form.

To take advantage of the PlanetNICFI R package you will need also an API key which you can receive once you are registered. For more details see the Getting Started with Planet APIs website.


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Digital Elevation Models using the 'CopernicusDEM' R package

In this blog post I’ll explain how to use the CopernicusDEM R package based on a use case of the Movebank animal tracking data. I picked animal tracking data because there is an abundance in the Movebank archive from all over the world. In this specific vignette I’ll use data of Wolves from the northeastern Alberta and Caribou from the British Columbia (see the reference papers at the end of the blog post for more information).


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