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Introducing the 'gimms' package

... is an open-access tutorial about the gimms package which has been developed using GitBook.

What's new?

2020-03-19, gimms 1.1.3 re-enables ECOCAST file retrieval

Online file retrieval from ECOCAST was recently unavailable due to SSL certificate issues. This has been fixed as of gimms-1.1.3. In addition, gimms:::updateNasanex() now yields correct online filepaths as outlined in #3.

2018-12-07, gimms 1.1.1 is out now

Starting with this update, rasterized NDVI3g.v0 images are no longer kept in memory, but properly linked to their corresponding files on disk (only applicable if 'filename' is specified in rasterizeGimms()).

2018-01-13, gimms 1.1.0 is now on CRAN

As of 2018-01-13, the next minor release of gimms has finally arrived on CRAN. Check out NEWS for a full list of changes. In addition, note that the accompanying GitBook will be updated (and hopefully extended) soon.

2017-01-02, "traditional" NDVI3g.v0 names from new NDVI3g.v1 files via oldNaming

For all users who prefer to work with the now outdated NDVI3g.v0 file names, I've added a function called oldNaming to the 'develop' branch. It takes a vector of .nc4 file names as input and transforms them to traditional half-monthly file names, optionally appending a suffix e.g. in preparation for writeRaster. As this is not on CRAN yet, remember to install the 'develop' version via

                         ref = "develop")

to be able to use that function in the first place.

2016-12-17, gimms 1.0.0 is now on CRAN

I am happy to announce that the brand-new package update (v1.0.0) has successfully been built for all platforms and is now available from CRAN. Among the major improvements are:

2016-01-15, gimms 0.5.0 is now on CRAN

As of today, gimms 0.5.0 is available from CRAN and has some new functionality:

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

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

                         ref = "develop")

and will be submitted to CRAN soon.

2015-11-06, pre-whitened Mann-Kendall trend test via significantTau

In order to account for lag-1 autocorrelation when trying to deduce reliable long-term monotonous trends, gimms now features a function called significantTau. The code imports the standard (i.e., without pre-whitening) procedure included in package Kendall (McLeod, 2011) or, if the user decides to apply pre-whitening prior to the actual trend test, one of the algorithms included in zyp (Bronaugh and Consortium, 2013). Check out ?significantTau for further details.

2015-10-26, downloadGimms now works properly on Windows

I recently received a bug report about some strange behavior of downloadGimms (when working on Windows platforms) which resulted in a rather awkward look of the rasterized images.


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.

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gimms documentation built on April 16, 2021, 5:08 p.m.