Overview | 1 The basics | 1.1 Dropping extra arguments automatically | 1.2 Named vector vs. named list | 1.3 Mixing .args and ... | 2 Selecting and removing arguments | 2.1 .use_args — allowlist | 2.2 .rem_args — blocklist | 2.3 Combining both | 3 Stripping name prefixes / suffixes | 4 Log-transformed parameters (.logged) | 5 Bounding parameters (.lower, .upper) | 5.1 .bound_raw = TRUE (default) — bounds in log₁₀ space | 5.2 .bound_raw = FALSE — bounds in real space | 5.3 The underlying ParmLim* helpers | 6 Log/unlog helpers (ParmLog / ParmUnLog) | 7 Functional argument constraints | 8 Real-world example: fitting a Normal distribution with optim | 9 Complex example: multi-component galaxy surface-brightness fitting | 10 Using .return = 'args' for debugging | 11 Verbose debugging (.verbose) | When is verbose useful? | 12 Performance note | 13 Quick-reference table

Overview | magaxis – pretty axis labelling | magplot – high-level scatter plots | z-coloured scatter | maghist – histogram with statistics | magclip – automatic sigma-clipping | magrun – running statistics | magerr – error bars | magcurve – draw a function curve | magbar – colour bar legend | magcon – 2-D density contours | magbin – 2-D binning | magimage – image display | magtri – triangle (corner) plots for MCMC chains | Basic triangle plot | Passing extra arguments via ParmOff | Reference values | Few labels per sub-panel | Custom axis labels

Plotting and loading images | Example 1: Histogram equalisation | Example 2: Edge detection | imager and ggplot2 | Blob detection/extraction of local maxima, denoising, scale-space | How images are represented | Learning more | imager functions by theme | Loading, saving, reading image information | Accessing image data, converting to and from other data structures | Conversions | Image parts | Neighbourhoods | Interpolation | Generating images | Modifying images | Filtering and FFTs | Morphology | Colour spaces | Split-apply-combine | Reductions | Misc.

From images to pixsets and back | Indexing using pixsets | Plotting and visualising pixsets | Coordinates for pixels in pixsets | Selecting contiguous regions, splitting into contiguous regions | Boundaries | Growing, shrinking, morphological operations | Common pixsets | Splitting and concatenating pixsets | Working with colour images | An example: segmentation with pixsets

QDF Proof | Some Example Usage