R-value

R-value or rvalue may refer to:

• In computer science, an r-value is a pure value which cannot be assigned to
• R-value (insulation) in building engineering, the efficiency of insulation of a house
• R-value (soils) in geotechnical engineering, the stability of soils and aggregates for pavement construction
• R-factor (crystallography), a measure of the agreement between the crystallographic model and the diffraction data
• In statistics, the Pearson product-moment correlation coefficient, or simply correlation coefficient
• In solid mechanics, the Lankford coefficient
• In epidemiology, the Basic reproduction number, the rate at which an infection is thought to spread

See also

• R rating (disambiguation)
• R₀, the basic reproduction number in epidemiology
• L-value (disambiguation)