pivot_wide_notes: Write 'note_on' and 'note_off' events in the same line (long...

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

Write note_on and note_off events in the same line (long to wide)

Description

Write note_on and note_off events in the same line (long to wide)

Usage

pivot_wide_notes(df_measures)

Arguments

df_measures

data.frame resulting of miditapyr$mido_midi_df() and then running tab_measures() (see example)

Value

A data.frame with the following columns pivoted to wide: c("m", "b", "t", "ticks", "time", "velocity"). Every column is pivoted to wide with the suffix "_note_on" & "_note_off" showing the values of the original column as a prefix. See ?tab_measures for an explanation of the meaning of these columns.

See Also

Other Pivot midi frame functions: pivot_long_notes()

Examples

## Not run: 
mid_file_str <- system.file("extdata", "test_midi_file.mid", package = "pyramidi")
mido_mid_file <- mido$MidiFile(mid_file_str)
dfc <- miditapyr$frame_midi(mido_mid_file)
ticks_per_beat = mido_mid_file$ticks_per_beat
df <- dfc %>%
  miditapyr$unnest_midi()

## End(Not run)
## Not run: 
dfm <- tab_measures(df, ticks_per_beat)
library(zeallot)
c(df_meta, df_notes) %<-% miditapyr$split_df(dfm)
df_notes %>% pivot_wide_notes()

## End(Not run)

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