piano_keys_coordinates: Table of piano keys coordinates

In urswilke/pyramidi: Generate and Manipulate Midi Data in R Data Frames

Table of piano keys coordinates

Description

A table containing the piano keys coordinates. Each piano key is centered at the midi note value it represents.

Usage

piano_keys_coordinates

Format

A data frame with 127 rows and 6 variables:

midi

integer from 0 - 127 containing the midi pitches

layer

integer 1 or 2 depending on whether key is white (1) or black (2)

xmin

xmin coordinate of the key

ymin

ymin coordinate of the key

xmax

xmax coordinate of the key

ymax

ymax coordinate of the key

Examples

library(ggplot2)
# Print dataframe:
piano_keys_coordinates
# Plot the keyboard:
piano_keys_coordinates %>%
  # plot white keys first that they don't cover half of the black keys:
  dplyr::arrange(layer) %>%
  ggplot(aes(ymin = ymin, ymax = ymax, xmin = xmin, xmax = xmax, fill = factor(layer))) +
  geom_rect(color = "black", show.legend = FALSE) +
  scale_fill_manual(values = c("#ffffdd", "#113300")) +
  coord_fixed(ratio = 10)

urswilke/pyramidi documentation built on March 7, 2024, 3:48 p.m.