Category talk:Variable © - Revision history

Jeg: /* Measured vs Inferred Variable -- Deborah Khider (talk) 13:43, 6 September 2016 (PDT) */

2016-09-06T21:47:35Z

‎Measured vs Inferred Variable -- Deborah Khider (talk) 13:43, 6 September 2016 (PDT)

Khider: /* Measured vs Inferred Variable -- ~~~~ */ new section

2016-09-06T20:43:08Z

‎Measured vs Inferred Variable -- ~~~~: new section

Khider: /* Variable vs Parameter -- ~~~~ */ new section

2016-09-06T20:33:58Z

‎Variable vs Parameter -- ~~~~: new section

New page

== Variable vs Parameter -- [[User:Khider|Deborah Khider]] ([[User talk:Khider|talk]]) 13:33, 6 September 2016 (PDT) ==

The distinction between parameter and variables is thus:

<blockquote><p>We refer to the relations which supposedly describe a certain physical situation, as a model. Typically, a model consists of one or more equations. The quantities appearing in the equations we classify into variables and parameters. The distinction between these is not always clear cut, and it frequently depends on the context in which the variables appear. Usually a model is designed to explain the relationships that exist among quantities which can be measured independently in an experiment; these are the variables of the model. To formulate these relationships, however, one frequently introduces "constants" which stand for inherent properties of nature (or of the materials and equipment used in a given experiment). These are the parameters.<ref>Bard, Jonathan (1974) Nonlinear Parameter Estimation. New York, Academic Press, p.11, isbn: 0-12-078250-2</ref></p></blockquote>

==References==
<references />

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 In most instances, measured Variables are the [[:Category:ProxyObservation ©| proxy observations]] as defined by Evans et al. <ref> Evans, M. N., Tolwinski-Ward, S. E., Thompson, D. M., & Anchukaitis, K. J. (2013). Applications of proxy system modeling in high resolution paleoclimatology. Quaternary Science Reviews, 76, 16-28. doi:10.1016/j.quascirev.2013.05.024
-  </ref>. One exception is the variable depth, which served to relate the [[:Category:PaleoData © | paleo data]] with its [[:Category:ChronData © | chronological]] counterpart.
+  </ref>. One exception is the variable depth, which served to relate the [[:Category:PaleoData © | paleo data]] with its [[:Category:ChronData © | age]] counterpart.
 ==References==
 <references />

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		+	==References==
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		+	== Measured vs Inferred Variable -- [[User:Khider\|Deborah Khider]] ([[User talk:Khider\|talk]]) 13:43, 6 September 2016 (PDT) ==
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		+	We chose to distinguish between measured variables (i.e., those that can be directly measured on the archive such as the [[Stable oxygen isotopes in foraminifera \| stable oxygen isotopes of foraminifera shells]]) and the inferred variables (in this case, temperature and the oxygen isotopic composition of seawater).
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		+	In most instances, measured Variables are the [[:Category:ProxyObservation ©\| proxy observations]] as defined by Evans et al. <ref> Evans, M. N., Tolwinski-Ward, S. E., Thompson, D. M., & Anchukaitis, K. J. (2013). Applications of proxy system modeling in high resolution paleoclimatology. Quaternary Science Reviews, 76, 16-28. doi:10.1016/j.quascirev.2013.05.024
		+	</ref>. One exception is the variable depth, which served to relate the [[:Category:PaleoData © \| paleo data]] with its [[:Category:ChronData © \| chronological]] counterpart.

	==References==		==References==
	<references />		<references />