Octave values
This functions returns the frequency values of the octaves below and above a specific frequency
octaves(x, below = 3, above = 3)
x |
a numeric vector, frequency of the note in Hz or kHz. |
below |
the number of octaves below |
above |
the number of octaves above |
A numeric vector with the octave series in frequency (Hz or kHz
depending on x unit).
Jerome Sueur
names <- c("C","D","E","F","G","A","B")
values <- c(261.63, 293.66, 329.64, 349.23, 392, 440, 493.88)
res <- sapply(values, FUN=octaves)/1000
op <- par(las=1,mfrow=c(2,1))
par(mar=c(0,4,1,1))
matplot(x=1:7, y=res, t="o", pch=names, xlab="",
ylab="Frequency (kHz) [linear scale]", col=rainbow(7), xaxt="n")
par(mar=c(4.5,4,0,1))
matplot(x=1:7, y=res, t="o", pch=names, xlab="Octave",
ylab="Frequency (kHz) [log scale]", col=rainbow(7), ylog=TRUE, log="y")
par(op)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.