R 3.4.0 released

R 3.4.0 was released some days ago. A compatibility update to RStudio is also available.

The repositories at this site and obviously also at CRAN now contain package binary distributions for R 3.4.x and R 3.3.x.

One major change in this release is that the JIT (just in time) compiler is enabled by default. I have not done any benchmarking yet.

I have written a page explaining how to upgrade your R installation.

The code examples in my book Learn R …as you learnt your mother tongue continue to work as expected. However not all the package updates for R 3.4.0 are yet in CRAN. In package ‘gganimate’ function gg_animate() has been renamed gganimate().

The code examples in our book R for Photobiology: Theory and recipes for common calculations run without problems. Due to recent updates to the packages in my R for Photobiology Suite, used in the book examples, fewer warnings than earlier are triggered.

ooacquire 0.1.2

This is the second release of package ‘ooacquire’. It is an important update as it include bug fixes and enhancements which have some (minor) effect on the calculated spectral values. The update also removes some spurious warnings and has additional documentation, although not yet in final form.This package allows the acquisition of spectral data from spectrometers from Ocean Optics connected through the OmniDriver run-time, which is available at no cost from Ocean Optics. The current version implements several corrections and measuring protocols unavailable elsewhere in a single modular framework. Some of these cannot be used off-the-shelf as they require the characterisation and calibration of each individual spectrometer, so as to obtain usable values for constants. However, once these constants are available they can be passed as data arguments without need to modify the package itself. Functions are provided for spectral irradiance, spectral transmittance and spectral reflectance measurements. As transmittance and reflectance measurements are normally done relative to reference objects the calibration requirements are less involved than for spectral irradiance.

The package is available through r4photobiology repository.

Please raise issues concerning bugs or enhancements to this package through Bitbucket at https://bitbucket.org/aphalo/ooacquire/issues