ooacquire 0.2.2

During the last two years development has continued at a slow pace. Most changes are to the functions for interactive acquisition of spectra, correction of bugs and tracking to changes in packages from which imports are made. Testing was done with new OmniDriver releases. Some data examples have been added and also replaced. Some progress with the vignettes has been done. However, the documentation still needs work.

One visible change is the move of the Git repository from Bitbucket to GitHub. Package ‘rOmniDriver’ has also been moved to GitHub and its documentation updated to reflect this.

Starting from this release, the changelog is included in the online documentation at http://docs.r4photobiology.info/ooacquire/.

Please raise issues concerning bugs or enhancements to this package through GitHub at https://github.com/aphalo/ooacquire/issues

NOTE: This package is NOT available through CRAN.

This package is available through the r4photobiology repository  and through GitHub.


  1. From the binary or source packages of the released version from the CRAN-compatible repository at http://r.r4photobiology.info/.
  2. From sources of the under development version retrieved from the Git repository at GitHub.


ggpmisc 0.3.2

This version (0.3.2) adds as new features scales and statistics that help with the creation of volcano and quadrant plots, such as used with transcriptomics and metabolomics data. A few rough edges remaining in the features added in versions 0.3.0. and 0.3.1 have been polished out. Two issues raised in Bitbucket about the documentation, highlighted some incomplete explanations. These explanations have now been expanded. One important change to the documentation of statistics whose returned values may change depending on arguments is the addition of an example of the use of geom_debug() from package ‘gginnards’ showing how to print to the R console the data returned by statistics, which is the input received by the paired geometries. The User Guide needs still some work, scheduled for the next release. Package documentation is available at https://docs.r4photobiology.info/ggpmisc/ as a web site.

Plots created using the new statistics and scales are shown below. In the quadrant plot, which observations were labelled and highlighted was decided automatically based on local 2D density. Counts for each quadrant are computed on the fly. As the plot is non-the-less created using the grammar of graphics, little if any of the flexibility of ‘ggplot2’ is lost.

Quadrant plot created with packages ‘ggplot2 (3.2.1)’, ‘ggpmisc (0.3.2)’ and ‘ggrepel (0.8.1)’.

Volcano plot created with packages ‘ggplot2’, ‘ggpmisc’ and ‘ggrepel’ (very small p-values have been squished to the top edge of the plotting area).

NOTE: The new version of ‘ggpmisc’ is on its way to CRAN.


This update includes a fix for a bug affecting autoplot() methods in the case of plotting multiple spectra in the same plot. It also includes improvements to the easy of use through the addition new or enhancements to existing convenience methods and functions. The required version of ‘photobiology’ is now 0.9.28 or higher.

The changes from version 0.3.2, the current CRAN release, are:

  • Make autotitle() the recommended method and deprecate the use of ggtitle_spct(), which remains available for backwards compatibility.
  • Enhance autotitle() to optionally set the caption in addition to title and subtitle of a plot.
  • Add support for setting of the plot caption controlled with the annotations argument of autoplot() methods.
  • Add convenience functions to make easier to modify default arguments used by autoplot() methods through R options: set_annotations_default() and set_w.band_default().
  • Add support for simultaneously adding and removing annotations from the current default by accepting lists of character vectors in addition to character vectors as argument for parameter annotations in autoplot() methods.
  • Add support in multiplot() function for adding a title to the composite figure.
  • Track changes in ‘photobiology’ (>= 0.9.28) adding support for using the "how.measured" attribute in plot titles, subtitles and captions.
  • Use a compute panel function instead of a compute group function in stat_wb_label(), stat_wb_box() and stat_wl_strip(), solving a bug affecting autoplot() methods when called with multiple spectra.

The justification for renaming the ggtitle_spct() function to autotitle() is that the new name is consistent with autoplot() and autolayer() in taking an R object of a specific class as first argument and automatically extracting the information from it.

Documentation web site at https://docs.r4photobiology.info/ggspectra/.

NOTE: The updated package is on its way to CRAN.

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

ggpmisc 0.3.1

After the previous major update to ‘ggpmisc’ (0.3.0), a follow up (0.3.1) with multiple new features and smoothed rough edges for some of the features added in version 3.0.0. Package documentation is available at https://docs.r4photobiology.info/ggpmisc/ as a web site.

The enhancements in this and the previous update to ‘ggpmisc’ are made possible by changes to ‘ggplot2’ (>= 3.0.0) made while adding support for sf (simple features).

The functions in ‘ggpmisc’ (>= 0.3.1) are related to different kinds of annotations and insets in ggplots. Annotations of plots with fitted-model equations, fit diagnosis, ANOVA and summary tables, highlighting and labelling of peaks and valleys in curves, and local density-based highlighting or labelling in scatter plots. Additionally specializations of the ggplot() constructor allow on-the-fly conversion of time-series. Two new geoms join geom_table() added in version 0.3.0, geom_plot() and geom_grob(). These three geoms make it possible to add tables, ggplots and arbitrary graphical objects (grobs) as insets to plots respecting the the Grammar of Graphics paradigm.

Inset plot showing means per group.
Inset grobs

A set of new geometries produce marginal annotations: geom_x_margin_point(), geom_y_margin_point(), geom_x_margin_arrow(), geom_y_margin_arrow(), geom_x_margin_grob() and geom_y_margin_grob().

Marginal “points” showing means per group.

Another novel feature is based on the addition of two new aesthetics npcx and npcy, the corresponding scales scale_npcx_continuous() and scale_npcy_continuous(), and several new geometries that make use of then: geom_text_npc(), geom_label_npc(), geom_table_npc(), geom_plot_npc() and geom_grob_npc(). These allow to position insets and annotations relative to the dimensions of the plotting area instead of using native data units. Using "npc" units is more natural for labels or insets that are not directly related to data but that look better if positioned consistently across multiple panels or multiple separately produced plots. One improvement to the stats from earlier versions of ‘ggpmisc’ is the use of these new geoms to achieve more consistent location for insets and labels.

Quadrant counts with panels.
Fitted equations in panels with free y limits.
Inset tables at different positions in different panels.

As in the announcement of the previous version, I have included some example plots taken from the documentation of the package. In all cases annotations are generated automatically, but formatting is flexible.

NOTE: The new version of ‘ggpmisc’ will be soon submitted to CRAN .