File:2015arcDev.png
Deviation of the observed value of Russian rouble from the elliptic approximation Arc, versus time $x$.
Value of rouble is measured in the USA cents.
Time is measured in days since 2014.10.27.
The experimental data are taken from sites
https://www.mataf.net/en/currency/converter-USD-RUB (and are marked with blue dots) and from
www.cbr.ru/scripts/XML_dynamic.asp?date_req1=01/01/2014&date_req2=01/05/2015&VAL_NM_RQ=R01235 and are narked with black bars.
The Arc approximation is function
$\mathrm{Arc}(x)=0.01\sqrt{(a+x)(b−x)}~ ~$ $~$ with $~a=471~$ and $~b=123~$.
The experimental data are loaded as arrays of pairs $X_n,F_n$ for $n=1..N$; the marks at the graphic are centred at points
$y=F_n-\mathrm{Arc}(X_n)$
References
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:09, 1 December 2018 | | 888 × 261 (59 KB) | Maintenance script (talk | contribs) | Importing image file |
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