Enum AttributeCombinationType 

pub enum AttributeCombinationType {
    Ignore,
    Default,
    Function,
    Sum,
    Prod,
    Min,
    Max,
    Random,
    First,
    Last,
    Mean,
    Median,
    Concat,
}

How to combine the attribute values of vertices or edges that are merged into one (igraph_attribute_combination_type_t).

The C attribute handler supports the following combinations, per attribute type (anything else fails with ErrorKind::AttributeCombination or ErrorKind::Unimplemented):

combination	numeric	boolean	string
Sum	sum	any is true	–
Prod	product	all are true	–
Min/Max	min/max	all/any are true	–
Mean	mean	majority (ties broken at random)	–
Median	– (unimplemented)	majority (ties broken at random)	–
Random, First, Last	yes	yes	yes
Concat	–	–	concatenation
Function	yes	yes	– (not supported by this crate)

Ignore and Default drop the attribute for every type.

Variants

Ignore

Drop the attribute from the result.

Default

The default behaviour of the handler: for the C handler, the attribute is dropped, like Ignore.

Function

A user supplied C function, see AttributeCombination::add_function.

Sum

Sum of the values (logical or for booleans).

Prod

Product of the values (logical and for booleans).

Min

Minimum of the values (logical and for booleans).

Max

Maximum of the values (logical or for booleans).

Random

A value chosen uniformly at random (uses igraph’s RNG).

First

The value of the first element of the merged group (in the order the merging function lists them, usually increasing id).

Last

The value of the last element of the merged group (usually the highest id).

Mean

Arithmetic mean (majority vote for booleans, with ties broken at random using igraph’s RNG).

Median

Median (majority vote for booleans; not implemented for numbers).

Concat

Concatenation of the strings.

Note: in igraph 1.0.0 and 1.0.1 the C handler (igraph_i_cattributes_cs_concat) concatenates the values of the first k elements of the graph (where k is the size of the merged group) instead of the values of the merged elements.

Trait Implementations

impl Clone for AttributeCombinationType

fn clone(&self) -> AttributeCombinationType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AttributeCombinationType

impl Debug for AttributeCombinationType

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

Formats the value using the given formatter.

impl Eq for AttributeCombinationType

impl From<AttributeCombinationType> for igraph_attribute_combination_type_t

fn from(value: AttributeCombinationType) -> igraph_attribute_combination_type_t

Converts to this type from the input type.

impl Hash for AttributeCombinationType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for AttributeCombinationType

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for AttributeCombinationType

impl TryFrom<u32> for AttributeCombinationType

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: igraph_attribute_combination_type_t) -> Result<Self>

Performs the conversion.