Type function for plotting jittered points. Arguments are passed to jitter.
type_jitter(factor = 1, amount = NULL)
factor
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numeric; used in calculation of amount when the provided amount is 0 or NULL.
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amount
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number or NULL; when positive, specifies the amount of jitter; see Details, also for other cases.
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The result of r <- x + amount * runif(n, -1, 1) where n <- length(x).
When amount is NULL (the default) amount <- factor * d/5 where d is about the smallest difference between adjacent unique (up to fuzz) x values.
If amount == 0, amount <- factor * (max(x) - min(x))/50, (using only finite x values), which is the same as in S and the references. In the above cases, the final amount is always ensured to be positive.
The short jitter() function is itself a succinct definition.
library("tinyplot")
# "jitter" type convenience string
tinyplot(Sepal.Length ~ Species, data = iris, type = "jitter")
# Use `type_jitter()` to pass extra arguments for customization
tinyplot(Sepal.Length ~ Species, data = iris, type = type_jitter(factor = 0.5))