R-value

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R-value or rvalue may refer to:

  • In computer science, a value considered independently of its storage location
  • [In computer science]Data value of a variable stored at some location in memory.
  • 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 ophthalmic optics, the distance between the segment optical center and the segment top
  • In solid mechanics, the Lankford coefficient

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