Struct concrete_commons::LogStandardDev [−][src]
pub struct LogStandardDev(pub f64);
Expand description
A distribution parameter that uses the base-2 logarithm of the standard deviation as representation.
Example:
use concrete_commons::{LogStandardDev, DispersionParameter}; let params = LogStandardDev::from_log_standard_dev(-25.); assert_eq!(params.get_standard_dev(), 2_f64.powf(-25.)); assert_eq!(params.get_log_standard_dev(), -25.); assert_eq!(params.get_variance(), 2_f64.powf(-25.).powi(2)); assert_eq!(params.get_modular_standard_dev::<u32>(), 2_f64.powf(32.-25.)); assert_eq!(params.get_modular_log_standard_dev::<u32>(), 32.-25.); assert_eq!(params.get_modular_variance::<u32>(), 2_f64.powf(32.-25.).powi(2)); let modular_params = LogStandardDev::from_modular_log_standard_dev::<u32>(22.); assert_eq!(modular_params.get_standard_dev(), 2_f64.powf(-10.));
Implementations
pub fn from_modular_log_standard_dev<Uint>(log_std: f64) -> LogStandardDev where
Uint: UnsignedInteger,
Trait Implementations
Returns the standard deviation of the distribution, i.e. $\sigma = 2^p$.
Returns the variance of the distribution, i.e. $\sigma^2 = 2^{2p}$.
Returns base 2 logarithm of the standard deviation of the distribution, i.e. $\log_2(\sigma)=p$ Read more
For a Uint
type representing $\mathbb{Z}/2^q\mathbb{Z}$, we return $2^{q-p}$.
For a Uint
type representing $\mathbb{Z}/2^q\mathbb{Z}$, we return $2^{2(q-p)}$.
For a Uint
type representing $\mathbb{Z}/2^q\mathbb{Z}$, we return $q-p$.
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Auto Trait Implementations
impl RefUnwindSafe for LogStandardDev
impl Send for LogStandardDev
impl Sync for LogStandardDev
impl Unpin for LogStandardDev
impl UnwindSafe for LogStandardDev
Blanket Implementations
Mutably borrows from an owned value. Read more