Difference between revisions of "Numeric Command"
From GeoGebra Manual
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:{{example|1=<div><code><nowiki>Numeric[sin(1), 20]</nowiki></code> yields ''0.84147098480789650665''.</div>}} | :{{example|1=<div><code><nowiki>Numeric[sin(1), 20]</nowiki></code> yields ''0.84147098480789650665''.</div>}} | ||
| − | + | {{note|1=If you don't specify enough digits then you can get an apparently wrong answer due to [http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html floating point cancelation]. | |
| − | + | :{{example|1= | |
| + | <code>Numeric[-500000000/785398163*sin(785398163/500000000)*1258025227.19^2+500000000/785398163*1258025227.19^2,10]</code> will give ''4096'' but <code>Numeric[-500000000/785398163*sin(785398163/500000000)*1258025227.19^2+500000000/785398163*1258025227.19^2,30]</code> will give ''0.318309886345536696694580314215''.}} | ||
| + | }} | ||
{{Note| See also [[File:Mode nsolve.svg|link=|24px]] [[Numeric Tool|Numeric]] tool. }} | {{Note| See also [[File:Mode nsolve.svg|link=|24px]] [[Numeric Tool|Numeric]] tool. }} | ||
Revision as of 14:27, 3 September 2015
CAS Syntax
- Numeric[ <Expression> ]
- Tries to determine a numerical approximation of the given expression. The number of decimals depends on the global rounding you choose in the Options Menu.
- Example:
Numeric[3 / 2]yields 1.5.
- Numeric[ <Expression>, <Significant Figures> ]
- Tries to determine a numerical approximation of the given expression, using the entered number of significant figures.
- Example:
Numeric[sin(1), 20]yields 0.84147098480789650665.
Note: If you don't specify enough digits then you can get an apparently wrong answer due to floating point cancelation.
- Example:
Numeric[-500000000/785398163*sin(785398163/500000000)*1258025227.19^2+500000000/785398163*1258025227.19^2,10]will give 4096 butNumeric[-500000000/785398163*sin(785398163/500000000)*1258025227.19^2+500000000/785398163*1258025227.19^2,30]will give 0.318309886345536696694580314215.
Note: See also 
Numeric tool.
Numeric tool. 
