Nomogram: Difference between revisions

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[[File:Parallel_Scale_Nomogram.svg|250px|thumb|A parallel-scale nomogram.]]A '''nomogram''' (from Greek νόμος ''nomos'', "law" and γραμμή ''grammē'', "line"), also called a '''nomograph''', '''alignment chart''' or '''abaque''', is a graphical calculating device, a two-dimensional diagram designed to allow the approximate graphical computation of a mathematical function.
[[File:Components of a Nomogram.png|250px|thumb|Components of a nomogram.]]A '''nomogram''' (from Greek νόμος ''nomos'', "law" and γραμμή ''grammē'', "line"), also called a '''nomograph''', '''alignment chart''' or '''abaque''', is a two-dimensional computational diagram designed to exert [[force (nonfiction)|force]] approximately equal to the graphical computation of a [[Mathematical function (nonfiction)|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.
It is a visual programming language based on the [[Gnomon algorithm]].
 
Nomograms use a parallel coordinate system invented by d'Ocagne rather than standard Cartesian coordinates.
 
A nomogram consists of a set of n scales, one for each variable in an equation.
 
Knowing the values of n-1 variables, the value of the unknown variable can be found, or by fixing the values of some variables, the relationship between the unfixed ones can be studied.
 
The result is obtained by laying a straightedge across the known values on the scales and reading the unknown value from where it crosses the scale for that variable.
 
The virtual or drawn line created by the straightedge is called an ''index line'' or ''isopleth''.
 
Other types of graphical calculators such as intercept charts, trilinear diagrams and hexagonal charts are sometimes called nomograms.


== In the News ==
== In the News ==
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== Fiction cross-reference ==
== Fiction cross-reference ==


* [[Nomogram]]
* [[Gnomon algorithm]] - a family of [[Mathematical function (nonfiction)|mathematical functions (nonfiction)]] which converts [[computation (nonfiction)]] to [[force (nonfiction)]].
* [[Tephigram]] - one of four thermodynamic diagrams commonly used in computational weather engineering.


== Nonfiction cross-reference ==
== Nonfiction cross-reference ==
* [[Force (nonfiction)]]
* [[Nomogram (nonfiction)]] - a two-dimensional diagram designed to allow the approximate graphical computation of a [[mathematical function (nonfiction)]].
* [[Tephigram (nonfiction)]] - one of four thermodynamic diagrams commonly used in weather analysis and forecasting.


External links:
External links:
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[[Category:Fiction (nonfiction)]]
[[Category:Fiction (nonfiction)]]
[[Gnomon algorithm]]
[[Category:Mathematics]]
[[Category:Mathematics]]

Latest revision as of 11:38, 23 October 2016

Components of a nomogram.

A nomogram (from Greek νόμος nomos, "law" and γραμμή grammē, "line"), also called a nomograph, alignment chart or abaque, is a two-dimensional computational diagram designed to exert force approximately equal to the graphical computation of a mathematical function.

It is a visual programming language based on the Gnomon algorithm.

In the News

Fiction cross-reference

Nonfiction cross-reference

External links:

Gnomon algorithm

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