R-value
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R-value can refer to:
- Properties of materials:
- R-value (insulation), the efficiency of insulation of a house
- R-value (soils), stability of soils and aggregates for pavement construction
- r-value, in computer science, a value that does not have an address in a computer language
- R-factor (crystallography), a measure of the agreement between the crystallographic model and the diffraction data
- In statistics, r (or r value) refers to the Pearson product-moment correlation coefficient, often called simply correlation coefficient
- In ophthalmic optics, r-value refers to the distance between the segment optical center and the segment top
[edit] See also
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