plot_fretboard: Chord and fretboard diagram plots

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Chord and fretboard diagram plots

Description

Create a fretboard diagram for a single chord or a general progression.

Usage

plot_fretboard(
  string,
  fret,
  labels = NULL,
  mute = FALSE,
  label_size = 10,
  label_color = "white",
  point_size = 10,
  point_color = "black",
  point_fill = "black",
  group = NULL,
  horizontal = FALSE,
  left_handed = FALSE,
  fret_range = NULL,
  fret_labels = NULL,
  fret_offset = FALSE,
  accidentals = c("flat", "sharp"),
  tuning = "standard",
  show_tuning = FALSE,
  asp = NULL,
  base_size = 20
)

plot_chord(
  chord,
  labels = NULL,
  label_size = 10,
  label_color = "white",
  point_size = 10,
  point_color = "black",
  point_fill = "black",
  group = NULL,
  horizontal = FALSE,
  left_handed = FALSE,
  fret_range = NULL,
  fret_labels = NULL,
  fret_offset = FALSE,
  accidentals = c("flat", "sharp"),
  tuning = "standard",
  show_tuning = FALSE,
  asp = NULL,
  base_size = 20
)

Arguments

string	integer or as a space-delimited character string; instrument string numbers.
fret	integer or as a space-delimited character string; fret numbers.
labels	NULL or character, optional vector of text labels, must be one for every point; or just the special value "notes".
mute	logical vector or specific integer indices, which notes to mute. See details.
label_size	numeric, size of fretted note labels.
label_color	character, label color.
point_size	numeric, size of fretted note points.
point_color	character, point color.
point_fill	character, point fill color.
group	optional vector to facet by.
horizontal	logical, directional orientation.
left_handed	logical, handedness orientation.
fret_range	fret limits, if not NULL, overrides limits derived from fret.
fret_labels	integer, vector of fret number labels for fret axis. See details.
fret_offset	logical set to TRUE to shift the fret axis number labels (if present) from being directly next to the fret to being aligned with the circles behind the fret.
accidentals	character, when labels = "notes" represent accidentals: "flat" or "sharp".
tuning	explicit tuning, e.g., "e, a, d g b e'", or a pre-defined tuning. See details.
show_tuning	logical, show tuning of each string on string axis.
asp	numeric, aspect ratio, overrides default aspect ratio derived from number of strings and frets.
base_size	base size for ggplot2::theme_void().
chord	character, a single chord given in fret notation. See details.

Details

These functions are under development and subject to change. They each return a ggplot object.

Use plot_chord() to create a fretboard diagram of a specific chord. plot_chord() accepts a character string in simple fretboard format, e.g., chord = "xo221o". Zero is allowed in place of "o". This only works when no spaces or semicolons are detected. The function checks for spaces first, then semicolons, to split fret numbers. Do not mix formats. For example, you can use chord = "xo221o", chord = "x 8 10 10 9 8" or chord = "x;8;10;10;9;8". Trailing delimiters are ignored (LilyPond format: "x;8;10;10;9;8;"). If there are fewer fret values than there are strings on the instrument, as inferred from tuning, then muted strings, x, are inferred for the remaining lower-pitch strings.

plot_fretboard() produces a more general fretboard diagram plot. It is intended for scales, arpeggios and other patterns along the fretboard. For this function, provide vectors of string and fret numbers. mute is available but not as applicable for this function; it is a pass-through from plot_chord(). For single chord diagrams, use plot_chord(). The letter "o" is also allowed in fret for open strings and will display below the lowest fret plotted. The number 0 is treated with the intent of displaying the corresponding position on the instrument neck.

Number of strings is derived from tuning. See tunings() for pre-defined tunings and examples of explicit tunings. tuning affects point labels when labels = "notes".

Providing fret_labels overrides the default (minimal) fret numbering behavior for the fret axis. These are only intended to be integers. The vector of integers given is sorted and subset if needed to the range of frets that appear in the plot. See example.

Value

a ggplot object

Examples

# General patterns: scale shifting exercise
string <- c(6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1)
fret <- "2 4 5 2 4 5 2 4 6 7 9 6 7 9 7 9 10 7 9 10" # string input accepted
plot_fretboard(string, fret, labels = "notes", fret_offset = TRUE)
plot_fretboard(string, fret, fret_labels = c(3, 5, 7, 9, 12), show_tuning = TRUE)

# open and muted strings on shifted general fretboard layout
# try to use plot_chord() if more suitable
plot_fretboard("6 5 4 3", "o 9 10 12", mute = 2, show_tuning = TRUE)

# Single chord diagrams
# open chord
idx <- c(1, 1, 2, 2, 2, 1)
fill <- c("white", "black")[idx]
lab_col <- c("black", "white")[idx]
plot_chord("xo221o", "notes", label_color = lab_col, point_fill = fill)

# moveable chord
plot_chord("355433", horizontal = TRUE, show_tuning = TRUE)

# leading x inferred; same as plot_chord("xxo321")
plot_chord("o231", fret_labels = 3)
plot_chord("10 12 13 11", show_tuning = TRUE)
plot_chord("o x 10 12 13 11", fret_range = c(9, 14), fret_labels = c(9, 12))

tabr documentation built on Sept. 12, 2024, 6:18 a.m.