A list of two datasets, vertices and edges, containing information on blood type (see http://www.redcrossblood.org/learn-about-blood/blood-types). The variables are as follows:
A list of two data frames:
the edges data set consists of three variables of length 27:
from, to: factor variables of blood types describing the relationship 'is compatible with'
group\_to: factor variable with levels 'same' and 'diff' for same or different blood type group not regarding the rho-gam factor.
the vertices data set consists of five variables and 32 rows:
label: factor variable of blood types,
type: factor variable of blood type, not regarding the rhesus factor,
rho: factor variable: 'pos' and 'neg' describing the rhesus factor,
Ethnicity: factor variable of four variables: 'Caucasians', 'African.American', 'Hispanic', and 'Asian',
Predominance: numeric variable consisting of the percentage points of each blood type within each ethnicity.