Determine quantiles of a Cauchy distribution

quantile() is the inverse of cdf().

Usage

# S3 method for class 'Cauchy'
quantile(x, probs, drop = TRUE, elementwise = NULL, ...)

Arguments

x

A Cauchy object created by a call to Cauchy().

probs

A vector of probabilities.

drop

logical. Should the result be simplified to a vector if possible?

elementwise

logical. Should each distribution in x be evaluated at all elements of probs (elementwise = FALSE, yielding a matrix)? Or, if x and probs have the same length, should the evaluation be done element by element (elementwise = TRUE, yielding a vector)? The default of NULL means that elementwise = TRUE is used if the lengths match and otherwise elementwise = FALSE is used.

...

Arguments to be passed to qcauchy. Unevaluated arguments will generate a warning to catch mispellings or other possible errors.

Value

In case of a single distribution object, either a numeric vector of length probs (if drop = TRUE, default) or a matrix with length(probs) columns (if drop = FALSE). In case of a vectorized distribution object, a matrix with length(probs) columns containing all possible combinations.

Examples

set.seed(27)

X <- Cauchy(10, 0.2)
X
#> [1] "Cauchy(location = 10, scale = 0.2)"

mean(X)
#> [1] NaN
variance(X)
#> [1] NaN
skewness(X)
#> [1] NaN
kurtosis(X)
#> [1] NaN

random(X, 10)
#>  [1]  9.982203 10.053876  9.916324 10.336325 10.167877 10.626557 10.046357
#>  [8] 10.001540 10.091892 10.137681

pdf(X, 2)
#> [1] 0.0009940971
log_pdf(X, 2)
#> [1] -6.913676

cdf(X, 2)
#> [1] 0.00795609
quantile(X, 0.7)
#> [1] 10.14531

cdf(X, quantile(X, 0.7))
#> [1] 0.7
quantile(X, cdf(X, 7))
#> [1] 7