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nomogram
EntityQ721129· pop 35· linked from 133 articles

Also known as nomograph, nomograms, alignment chart, abaque

thumb|A typical parallel-scale nomogram. This example calculates the value of T when S = 7.30 and R = 1.17 are substituted into the equation. The isopleth crosses the scale for T at just under 4.65.

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11 sections
Contents
  • Description
  • Applications
  • Examples
  • Parallel-resistance/thin-lens
  • Chi-squared test computation
  • Food risk assessment
  • Other quick nomograms
  • See also
  • References
  • Further reading
  • External links

thumb|A typical parallel-scale nomogram. This example calculates the value of T when S = 7.30 and R = 1.17 are substituted into the equation. The isopleth crosses the scale for T at just under 4.65.

A nomogram (), also called a nomograph, alignment chart, or abac, is a graphical calculating device, a two-dimensional diagram designed to allow the approximate graphical computation of a mathematical function. The field of nomography was invented in 1884 by the French engineer Philbert Maurice d'Ocagne (1862–1938) and used extensively for many years to provide engineers with fast graphical calculations of complicated formulas to a practical precision. Nomograms use a parallel coordinate system invented by d'Ocagne rather than standard Cartesian coordinates.

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