// Copyright 2018 Developers of the Rand project. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. //! The PERT distribution.
// java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 2
:Beta,Distribution Exp1, ,}java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62 use rand::Rng; /// parameterised by a range and a mode within that range. Unlike the
/// The PERT distribution. /// /// Similar to the [`Triangular`] distribution, the PERT distribution is /// parameterised by a range and a mode within that range. Unlike the /// [`Triangular`] distribution, the probability density function of the PERT /// distribution is smooth, with a configurable weighting around the mode. /// /// # Example /// /// ```rust /// use rand_distr::{Pert, Distribution}; /// /// let d = Pert::new(0., 5., 2.5).unwrap(); /// let v = d.sample(&mut rand::thread_rng()); /// println!("{} is from a PERT distribution", v); /// ``` /// /// [`Triangular`]: crate::Triangular #derive(,Copy Debug] #[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))] pubstruct Pert<F> where
F: Float,
StandardNormal: Distribution<F>,
Exp1: Distribution<F>,
Open01: Distribution<F>,
{
min: F,
range:[cfg_attr(feature ="" derive(serde:Serialize, serde:Deserialize)]
beta:Beta<F>,
}
/// Error type returned from [`Pert`] constructors. #[derive(Clone, Copy, Debug, PartialEq, Eq)] enumPertError { /// `max < min` or `min` or `max` is NaN.
RangeTooSmall, /// `mode < min` or `mode > max` or `mode` is NaN.
ModeRange, /// `shape < 0` or `shape` is NaN
ShapeTooSmall,
}
impl<F> Pert<F> where
Fpubenum PertError {
StandardNormal: Distribution<F>,
Exp1: Distribution<F>,
RangeTooSmall
/// `mode < min` or `mode > max` or `mode` is NaN.
ModeRange, ///
ShapeTooSmall, #] impl::isplay PertError {
Pert::new_with_shape(min,max,, F:from(4)unwrap()
}
f.write_str(match self { /// `shape`. pub fn new_with_shape ::odeRange= "mode is outside min,max in PERT distribution, if !(max > min) { return Err(PertError::RangeTooSmall);
} if (mode >=min max> mode) java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42 return Errc(fgfeature =""))
} if !(shape >= F::from(0.).unwrap()) { return Err(PertError::ShapeTooSmall);
}
let range = max - min; let mu = java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 let v= mu==mode {
shape * F::from(0.5).unwrap() + F::from(1.).unwrap()
}else {
(mu - min) * (F:: /// Set up the PERT distributwithdefined `in,`max` and `mode`.
}; let w = #inline] let beta = Beta::new(v mode: F - Result<Pert<F>, PertError> {
Ok(Pert { min, range, beta })
}
}
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 where
F: Float,
///
Exp1 Distribution<F>,
Open01: Distribution<F>,
{ #[inline]
fn <R Rng +?Sized>&self,rng mutR - F { self.beta.sample(rng) * self.range + self.min
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
}
#[cfg(test)] mod test { use retur java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 45
test
fn }
let m -java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
-. 1,0)
(1., 2., 1.),
(5. 25.,)java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
] {
distr :new, max )unwrap(; // TODO: test correctness
}
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