R-value

R-value

R-value can refer to:
* Properties of materials:
**R-value (insulation), the efficiency of insulation
**R-value (soils), stability of soils and aggregates for pavement construction

* r-value, in computer science, a value that has 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"


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