Zero-Inflated Distributions
Density and distribution functions for zero-inflated distributions.
dzero_inflated_poisson(x, lambda, zi, log = FALSE) pzero_inflated_poisson(q, lambda, zi, lower.tail = TRUE, log.p = FALSE) dzero_inflated_negbinomial(x, mu, shape, zi, log = FALSE) pzero_inflated_negbinomial(q, mu, shape, zi, lower.tail = TRUE, log.p = FALSE) dzero_inflated_binomial(x, size, prob, zi, log = FALSE) pzero_inflated_binomial(q, size, prob, zi, lower.tail = TRUE, log.p = FALSE) dzero_inflated_beta(x, shape1, shape2, zi, log = FALSE) pzero_inflated_beta(q, shape1, shape2, zi, lower.tail = TRUE, log.p = FALSE)
x |
Vector of quantiles. |
zi |
zero-inflation probability |
log |
Logical; If |
q |
Vector of quantiles. |
lower.tail |
Logical; If |
log.p |
Logical; If |
mu, lambda |
location parameter |
shape, shape1, shape2 |
shape parameter |
size |
number of trials |
prob |
probability of success on each trial |
The density of a zero-inflated distribution can be specified as follows. If x = 0 set f(x) = θ + (1 - θ) * g(0). Else set f(x) = (1 - θ) * g(x), where g(x) is the density of the non-zero-inflated part.
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