Description Usage Arguments Details Value Warning Author(s) References Examples
Convert a single or a list of float or integer to a string using SI prefixes.
1 |
number |
number to convert |
unit |
string to attach behind the SI prefix |
Main application of this function is to get nice strings to place at axis ticks. In this case some prefixes like deka are not used. This function will only generate 10^(3*n) prefixes for positive numbers at the moment. This may change soon.
comp1 |
string using SI prefixes |
package is still in alpha stage
Jonas Stein news@jonasstein.de https://github.com/jonasstein/sitools
http://www.bipm.org/en/si/si_brochure/chapter3/prefixes.html
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | library(sitools)
# convert single number
f2si(10000)
# convert single number with unit
f2si(0.023, unit="V")
# convert list of numbers
numbers <- c(1e5, 3.5e19, 0.004)
f2si(numbers)
# how to create fancy axis labels
# generate some data
xdata <- 10^(0:10)
ydata <- sin(xdata)^2
# lets assume the ticks should be at 1,2,4 ..10,20,40...
tickvalues <- 10^(0:10)
# plot the data and generate axis
plot(x=xdata, y=ydata, log="x", xlim=c(1,1e10), xaxt="n",xlab="Frequency (Hz)")
axis(1, at=tickvalues, labels=f2si(tickvalues))
|
[1] "10 k"
[1] "23 mV"
[1] "100 k" "35 E" "4 m"
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