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IsoriX 0.9.3

New features

• a new global option title_delta_notation is available to modify the delta notation for all plotted isoscapes. The can be use, for example, to fix some issues with the display of the delta character, or for using another stable isotope than deuterium. See ?options_IsoriX for details.
• new datasets CalibDataBatRev, CalibDataBat2Rev, AssignDataRev and AssignData2Rev which are revised version of CalibDataBat,CalibDataBat2,AssignDataandAssignData2` (respectively). The bat fur isotope values were corrected to align with the current delta values for keratin reference materials (Soto et al. 2017, https://doi.org/10.1002/rcm.7893) ensuring comparability between formerly and more recently normalized datasets of delta values for deuterium.

Breaking changes

• the dataset CalibDataBat2 now contains slightly different elevation values (the one reported by field workers as opposed to those extracted from a specific elevation map).
• the dataset CalibDataBat now contains different values for the column “site_ID”.

Major changes

• the functions prepsources(), calibfit() and isofind() emit warnings if some locations share the same location IDs or if several locations IDs correspond to a unique location. This should help users to spot issues in their data (fixes #133).

Minor changes

• the functions terra::extract() and lattice::lpolygon() now re-exported and lattice::panel.points()) no longer is.

Small fixes

• the URL for WorldClim data was outdated so getprecip() was no longer working.
• some internal code had arguments misspelt. It was working as a result of R’s ability to do partial matching, but this was not good practice. It is now fixed (fixes #181).
• some links in the documentation were incomplete and flagged is some online CRAN checks (“Found the following Rd file(s) with Rd targets missing package”). This should now be fixed.
• function names should now be consistently displayed as computer code in the documentation.

Internal (geeky) changes

• the project is now being setup so that the development using VScode is possible.
• the format of the NEWS file has been changed to allow for using usethis::use_github_release() to create new releases (fixes #177).
• the description of datasets now relies on the markdown syntax.

IsoriX 0.9.2

Main release goal

• This release restores some key features that had been lost after dropping the direct dependencies raster and sp in v0.9.1.:
  • the possibility to save and reload objects created by IsoriX (now via saveRDS() and readRDS()). (#172)
  • the possibility to plot oceans and other masks containing “holes” (thanks to changes in lattice and rasterVis). (#169, #170)

Breaking changes

As compared to IsoriX versions < 0.9.1, the following changes may break existing code:

• code for plots:

  layer(sp.polygons(CountryBorders, col = "white")) +
  layer(sp.polygons(OceanMask, col = "white", fill = "lightgreen"))

  now needs to be replaced by:

  layer(lpolygon(CountryBorders, border = "white")) +
  layer(lpolygon(OceanMask, border = "white", col = "lightgrey"))

  Notice both the change in the function used to plot polygons and the change in the arguments used to control the colour of the borders and the colour of the fill. Similarly, the function sp.points() should be replaced by lpoints() and so on.

• saving and reloading objects save() & load() can no longer be used, one must instead use saveRDS() & readRDS().

New features

• the NEWS (contained in this file) are now stored in NEWS.md rather than in inst/NEWS.Rd and use a markdown syntax.
• it is now possible to have missing values in predictors used to build isoscapes and in the isoscapes themselves.

Major changes

• plotting methods for polygons, lines and points have been removed from IsoriX and are now handled by lattice and rasterVis.

• new S3 and S4 methods saveRDS() for objects of the class ISOSCAPE, CALIBFIT & ISOFIND (see ?serialize for details).

• new S3 and S4 method readRDS() which should be able to read objects created in IsoriX, as well as objects created with terra and objects created otherwise.

  In case of issues reading RDS files not created by IsoriX, try using base::readRDS() with the namespace base:: mentioned explicitly and please let us know of this issue.

Minor changes

• the bookdown is now listed in DESCRIPTION.
• some old URLs have been updated.

Bug fixes

• the function isomultiscape() was still using raster instead of terra.
• the object PrecipBrickDE was still using raster instead of terra.

Internal (geeky) changes

• new function .safe_and_quiet_predictions() which turns wraps around spaMM::predict.HLfit(), turns warnings into messages, allows not to display the same messages many times, and outputs NAs when spaMM::predict.HLfit() fails. For testing, options_IsoriX(spaMM_debug = TRUE) may be used to restore the original behaviour of spaMM::predict.HLfit().
• the classes ISOSCAPE, CALIBFIT & ISOFIND are now also defined as S4 classes, which was necessary to design methods for saveRDS() which are compatible with terra.
• the package now contains a WORDLIST file which is used by devtools::spell_check() (via spelling::spell_check_package) to check for typos in the documentation.
• fixed various | or & which should have always been || or && (spotted via lintr::lint_package()).
• fixed various sequences of the form 1:... which should have always been handled by seq_along or seq_len to avoid NULL issues (spotted via lintr::lint_package()).
• package withr now suggested; we use it to automatically delete a file created during testing (using withr::defer).
• instead of one Rproj file used to handle both the package and the bookdown development, we now rely on 2 Rproj files, which solves some limitations encountered with usethis.

v0.9.1

Main release goal

• Several spatial packages previously used by IsoriX are likely to retire sometimes in October 2023. The maintainers of those packages have recommended developers to instead rely on alternative packages which have been recently developed and which superseed the old packages. As a consequence, we had to recode a lot of IsoriX for it to continue to work. For the most part, these changes are internal and should not impact much users, but it is possible that old workflows used to create plots will have to be adapted for the code to keep working. Moreover, IsoriX is not the only package that had to be overhauled, other packages used by IsoriX are also being adapted, which means that the programming landscape is dynamic and bugs caused by incompatibility between packages are likely to surface. We will do our best to react quickly, but please let us know as soon as something goes wrong by dropping issues on the GitHub repository for IsoriX (https://github.com/courtiol/IsoriX/issues). All this change can be perceived as annoying, but it is also for the best: it will allow us to add new features more easily in IsoriX in the future and it also makes it easier for users to convert IsoriX outputs so as to manipulate them using packages such as sf and ggplot2.

Major changes

• IsoriX no longer relies on the package raster. It instead now uses terra for handling rasters. (#90 #161)
• IsoriX no longer relies on the package sp. Plotting functionalities from sp have now been replaced by direct calls to lattice. For now, we had to implement methods and generics calling lattice in IsoriX, but those should ultimately be handled within rasterVis and lattice.

Minor changes

• getprecip() now normalizes the input file and returns the path where the precipitation rasters are stored.
• prepcipitate() can now handle as input for path = either the full path to the files returned by getprecip() – which contains the folder provided to path when calling getprecip() in addition to "/wc2.1_30s_prec" – or the reduced path which only contains the folder provided to path when calling getprecip().
• getprecip() now changes the timeout R options temporarily so as to avoid the download to fail because the default timeout setting is too short. (#148)
• the documentation for the datasets GNIPDataALLagg and GNIPDataEUagg was incorrect. (#158)
• one message about possible extrapolation during calibration was erroneous and is now removed. (#159)

Internal (geeky) changes

• OceanMask and CountryBorders are no longer stored as RDA files in /data, but as RDS files in /extata since objects created with terra cannot be saved as RDA files. These files are automatically loaded when the package is attached.
• elevatr moved from Imports to Suggests. (#157)

v0.9.0

Bug fixes

• the previous released introduced an error in how the variance of the assignment test is computed in the absence of calibration (with important consequence in terms of assignments). This is now fixed. (#151)

Minor changes

• the base package colourspace is now suggested to avoid a note in R CMD check.

v0.8.3

New features

• the function calibfit() gains an argument method that allows for selecting one of four calibration methods (“wild”, “lab”, “desk”, “desk_inverse”). This allows for users to use:

  1. calibration samples associated with unknown environmental isotopic values,
  2. calibration samples associated with known environmental isotopic values, or
  3. & 4) the intercept and slope of a calibration relationship computed by others (e.g. values found in a paper).

  Note: the “desk” methods allow for the consideration of a fractionation factor too (i.e. slope = 0). See ?calibfit for details. (#20 & #142)

• the function getelev() has been completely rewritten so as to rely on the package elevatr to download elevation data. You should check ?getelev for learning how to use the new version of the function, but we retained the core principle of the previous function so that old workflow will only require minor adjustments. The new version still saves a *.tif file on the disk, albeit using a different file name to avoid (data) confusion. (#140 & #107)

• the function isofind() gains an argument neglect_covPredCalib that allows for the computation of a covariance term that was so far neglected in IsoriX. See ?isofind for details. (#143)

• the function prepraster() gains an argument values_to_zero to turn a range of elevation values to zeros (nullify negative elevation values by default). This is particular useful because the new version of get_elev() download an elevation raster that includes bathymetry.

• new internal function .invert_reg() to invert regression (used for method “desk_inverse” in calibfit().

Minor changes

• when calling plot() on an object created with calibfit(), the plotting function now returns the fitted values and CI for users to be able to make alternative plots. (#44)
• new argument xlim for the plotting function for calibration fits.
• new argument line for customizing how to plot the regression line in calibration fits.
• the summary method for calibration fits now displays the residual variance.
• calibfit() performs more check on extrapolation. (#119)
• when using plot() on an object of class ISOFIT, the x-axis for the plot showing the Matérn correlation should have a range more adequate irrespective when autocorrelation is strong over short distances. (#134)
• documentation for ?plot() now contains a description of what symbols mean in plots. (#138)
• when calling plot() on an object created with isofind(), the plotting function now detects sample of size 1 and no longer displays “Group” in the title of the assignment plot even if who = “group”. (#120)
• all functions accepting a data.frame as input should also now be compatible when provided with a tibble. (#118)
• typos have been corrected. (#130)
• default y-axis title changed to “Isotopic value in the environment” when plotting calibration fits to be flexible enough irrespective of the methods used in calibfit()

Internal (geeky) changes

• the argument long_min, long_max, lat_min & lat_max function prepsources() now have explicit default values and should no longer be missing.
• the version of spaMM required by IsoriX has changed to 3.13 so as to benefit from a new extractor we rely on for the computation of the 4th variance term during assignment. (#143)
• the function depending on the package RandomFields are no longer available since that package has been (for now) retired by CRAN :-(
• IsoriX should now work with tibbles as inputs. (#118)

Bug fixes

• the printing method for the object of class ISOSCAPE was somehow not exported and thus not used (unreported issue).
• plotting on a sphere ISOFIND objects did not work in some cases. (#126)

v0.8.2

New features

• new argument ylim for the plotting function for calibration fits.
• it is now possible to calibrate data containing missing isotopic values.
• it is now possible to assign data containing missing isotopic values.

Internal (geeky) changes

• the SpatialPolygons CountryBorders and OceanMask have been rebuilt for possibly improving the compatibility with new sp & rgdal.
• the website for WorlClim has now changed address, so links have been updated.
• rgdal is now listed as a suggested package.

Minor changes

• several URL had changed and have been updated.
• all old defunct functions have been removed from the package.

v0.8.1

Bug fixes

• the plotting function was not working for isoscapes not stored in memory due to a wrong use of the quantile function. Many thanks to Dr. Gary Roemer and Amy Withers for reporting it! (#113)

New features

• the datasets used in Courtiol et al. 2019 are now provided.
• many useful functions from raster, rasterVis, lattice… are now re-exported so they can be used without attaching those packages.
• new option in plots that allows to map the isoscape onto a sphere.
• a new dataset PrecipBrickDE containing monthly precipitation amounts for Germany.
• an argument y_title for the plotting function for isoscapes to allow one to simply change the title.
• arguments xlab and ylab for the plotting function for calibration fits.
• new method points for plotting more than one calibration fit.
• the plotting function for assignments can now show the location of the assignment samples.

Major changes

• the citations for the package have been updated!
• many objects have been renamed to prepare the release of the version 1.0.
• the vignettes have now been moved to a bookdown. To access the documentation you should now visit: https://bookdown.org/content/782/

Minor changes

• all arguments with the structure bla.bla have been renamed so as to match the structure bla_bla.
• the plotting function for calibfit() gains an argument ... for more control.
• a plotting method for rasterLayer has been included for convenience.
• the function relevate() is now called prepraster().
• the function prepdata() is now called prepsources().
• in several functions the argument elevation.raster has been renamed as raster.
• in several functions the argument xxx.data has been renamed as data.

Internal (geeky) changes

• the file storing the internal functions is now called zzz.R.
• the dontrun and donttest calls have been replaced by comments due to new R CMD check flags.
• the function downloadfile() is now exported.
• large temporary objects are now deleted within isofind to limit memory usage.
• the package is now being tested using testthat, but tests will be implemented in the future.
• a lot of the internal code as been rewritten to comply more closely to the IsoriX coding style.
• the list of suggested packages has been revised and rgdal removed as it caused (again) problems with Travis CI.
• following a change in spaMM predict.HLfit(), the prediction are now being made by chunk of 1000 points instead of 150. This should lead to a tiny gain in performance.
• the function isoscape() was performing predictions twice every 150 (or now 1000) locations, this was not influencing the isoscapes produced, but this has now been corrected.
• the function prepraster() now produces an raster stored in memory if it is possible. This should prevent bugs that appears when using loaded rasters that were previously saved (the temporary link to the hard drive location is no longer correct in this case).
• the function .objective_fn_calib() has been moved within the function calibfit() as it is not used elsewhere.
• the function calibfit() as been prepared for a possible activation of a random effect for species ID in the future. But whether it would make sense or not remains to be determined.
• the function .Fisher_method() now directly computes the exponential of the log pv if only one value is provided. This leads to much faster assignment in the case of a single observation.

Bug fixes

• the plotting function for calibration fit was displaying CI based on variance instead of SD.
• the function getprecip() and prepcipitate() were not handling paths manually defined properly.
• the plotting functions were crashing in case of no variation in the landscape.
• the plotting functions were crashing when called on multiple-raster objects not stored ‘inMemory’.
• the plotting function for fitted model was not displaying one plot in RStudio when called on objects of class MULTIISOFIT.

v0.7.1

New features

• this is a minor update necessary to maintain compatibility with spaMM 2.4.

Internal (geeky) changes

• the syntax for the extraction of correlation terms of spaMM objects has changed.

v0.7

New features

• the calibration step is now optional, allowing for users to use an isoscape directly fitted on tissues instead of precipitation water.
• the function queryGNIP() has been renamed and is now called prepdata(), this function can also handle other datasets than GNIP.
• the function relevate() has been modified to make crop possible around the pacific meridian -180/180 (but several issues remain to handle extra plot layers automatically).

Internal (geeky) changes

• an additional options as been added to prevent prompting during examples.
• new internal function .converts_months_to_numbers().

v0.6

New features

• the maximum duration of running time for examples can now be controlled using IsoriX.options(example_maxtime = XX).
• due to new GNIP policies, we no longer provide the GNIP dataset for the entire World, but only a subset containing data for Germany (users should thus compile their precipitation data themselves from the ‘wiser’ platform provided by GNIP; see vignette Workflow).
• it is now possible to control the colours and labels for the levels of isotopes or p-values in plots.
• for plotting, it is no longer needed to load the ocean mask and country borders (it now happens automatically).
• the function relevate() now allows for a cropping larger than the extent of the weather stations by means of the argument margin_pct.
• it is now possible to create the so-called annual averaged precipitation isoscapes!
• queryGNIP can now split the dataset per month or year at each location during the aggregation.
• new function prepcipitate() to prepare the precipitation brick.
• new function getprecip() to download monthly precipitation rasters from WorldClim.
• new function isomultifit() fitting isoscapes per strata (month, year, or any “split”).
• new function isomultiscape() building isoscapes averaged across strata.
• new function create_aliens() simulating of organism data.

Minor changes

• the inputs for filtering data by month or year using queryGNIP() have changed.
• the default fixed effect structure for the mean model is isofit() has changed.

Internal (geeky) changes

• the namespace is now generated with Roxygen2.
• the datasets are now ‘lazy-loaded’.
• new vignette for coding conventions.
• changed some object names following our coding convention (more to come).

v0.5

Bug fixes

• the package could not be detached and reloaded.
• the citation was not correct.
• the path in getelev() was breaking in some cases.
• the title of the assignment plot was missing when a single individual was plotted.

New features

• new vignette explaining how to export spatial objects to GIS.
• the file GNIPdata has been updated and now contains data for 2014.
• names of all functions and objects have been refactored to remove upper cases.
• links to our GitHub directory have been added.
• new function downloadfile() to download non standard elevation raster or any other file.
• function getelev() can perform MD5 sum checks if the package tools is installed.
• function getelev() can display additional information during download if verbose > 1.
• the column animalID in the assignment dataset can now handle names with spaces.
• added Codecov to track test coverage for the package.

Minor changes

• the modification of the option set_ll_warn from the sp package has been moved to .onLoad() (instead of .onAttach()) and the original state is now restored while unloading IsoriX.
• the Earth distance method has been moved to the package spaMM.
• function getelev() lost its address argument as downloadfile() should now be used to download non-standard elevation rasters.
• some typo fixed in documentation files.
• RandomFields moved to suggest.
• *.Rd files for documentation are now generated with Roxygen2.
• queryGNIP() is now provided with a single month argument specifying the months to select.

v0.4-1

• this was the first version of IsoriX submitted to CRAN.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.