Struct CosmoValue 

pub struct CosmoValue {
    pub value: f64,
    pub h_dependency: i32,
}

Cosmological value that contains an explicit h scaling.

Fields

value: f64

Floating value which is to be scaled by h.

h_dependency: i32

Explicit h scaling power. For example, 1 h^-1 will have a h_dependency of -1.

Implementations

impl CosmoValue

pub fn approx_eq(&self, other: &Self, decimal_place: i32) -> bool

Approximately equal method for a given decimal precision.

Helper method for determining if two CosmoValue are approximately equal. Since units are only using f64 floating point errors can occur. In addition there are some use cases where absolute precision is not possible (comparison to other quantities in other works with different significant figures for example.), Here decimal_place refers to up to what decimal should be included in the comparison.

h dependency is included in the comparison, so even if the values are within the tolerance, non-equivalent h dependency will result in a “false”.

use astroxide::units::*;
let x = CosmoValue::new(5., -1);
let y = CosmoValue::new(5., -2);
let z = CosmoValue::new(5.0001, -1);
assert!(!x.approx_eq(&y, 9));
assert!(x.approx_eq(&z, 3));

impl CosmoValue

pub fn new(value: f64, h_dependency: i32) -> Self

Constructs a new CosmoValue from the given value and h_dependency.

Examples

Creating the value 0.7 h^-1. Can be done by:

use astroxide::units::*;
let x = CosmoValue::new(0.7, -1);

Trait Implementations

impl Clone for CosmoValue

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CosmoValue

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for CosmoValue

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Div<CosmoValue> for h

type Output = CosmoValue

The resulting type after applying the / operator.

fn div(self, rhs: CosmoValue) -> Self::Output

Performs the / operation.

impl<T: UnitLike> Div<T> for CosmoValue

type Output = CosmoQuantity

The resulting type after applying the / operator.

fn div(self, rhs: T) -> Self::Output

Performs the / operation.

impl Div<h> for CosmoValue

type Output = CosmoValue

The resulting type after applying the / operator.

fn div(self, rhs: h) -> Self::Output

Performs the / operation.

impl Mul<CosmoValue> for h

type Output = CosmoValue

The resulting type after applying the * operator.

fn mul(self, rhs: CosmoValue) -> Self::Output

Performs the * operation.

impl<T: UnitLike> Mul<T> for CosmoValue

type Output = CosmoQuantity

The resulting type after applying the * operator.

fn mul(self, rhs: T) -> Self::Output

Performs the * operation.

impl Mul<h> for CosmoValue

type Output = CosmoValue

The resulting type after applying the * operator.

fn mul(self, rhs: h) -> Self::Output

Performs the * operation.

impl PartialEq for CosmoValue

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CosmoValue