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Introducing the 'gimms' package

... is an open-access tutorial about the gimms package which is now available from GitBook. The book will be continuously updated as gimms develops further, so make sure to check it out regularly!

What's new?

2015-12-16, added parallel support

I decided to add optional multi-core support to downloadGimms, rasterizeGimms and monthlyComposite. The referring arument is called 'cores' and, if not specified otherwise, defaults to 1 (i.e., parallel computing is disabled). In the course of this, the gimms package version on branch 'develop' has been incremented to 0.4.0 and can be installed via devtools::install_github (see further below).

2015-11-13, gimms 0.3.0 is now on CRAN

It's Friday 13th and an updated version of the gimms package has been published on CRAN. The new version includes

  • significantTau to calculate pixel-based (and optionally pre-whitened) Mann-Kendall trend tests from a previously processed GIMMS NDVI3g (or any kind of) 'RasterStack/Brick' object. Note that it also works with simple 'numeric' vectors (i.e., univariate time series observations);
  • the below compatibility update of downloadGimms that enabled 'Date' input;
  • and some minor bug-fixes.
2015-11-11, downloadGimms now works with 'Date' input

In response to recent user suggestions, I decided to enable 'Date' input for downloadGimms which grants the user a finer control over the temporal coverage of the data to be downloaded. The changes are currently available from the 'develop' branch via

devtools::install_github("environmentalinformatics-marburg/gimms", 
                         ref = "develop")

and will be submitted to CRAN soon.

The problem was obviously related to download.file which worked just fine on Linux when using the default settings, but introduced distortions on Windows. In the newest package version 0.2.0 which is now brand-new on CRAN, I therefore specified download.file(..., mode = "wb") to explicitly enable binary writing mode.

Thanks again for the input!

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Version

Install

install.packages('gimms')

Monthly Downloads

241

Version

1.0.0

License

GPL (>= 3) | file LICENSE

Maintainer

Florian Detsch

Last Published

December 16th, 2016

Functions in gimms (1.0.0)

downloadGimms

Download GIMMS NDVI3g Data
rasterizeGimms

Rasterize GIMMS NDVI3g Data
rearrangeFiles

Rearrange GIMMS NDVI3g.v0 Files
monthlyComposite

Calculate Monthly Composite Images
significantTau

Compute (Pre-Whitened) Kendall's \(\tau\)
monthlyIndices

Create Monthly Indices from NDVI3g Files
qualityControl

Perform Quality Control on GIMMS NDVI3g Data
kili3g.v0

Kilimanjaro NDVI3g.v0
bale3g.v1

Bale Mountains NDVI3g.v1
gimms-package

Download and Process GIMMS NDVI3g Data
updateInventory

Update GIMMS NDVI3g File Inventory