Difference between revisions of "FractionalPart Function"
From GeoGebra Manual
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*<code><nowiki>fractionalPart( 1/5 + 3/2 + 2 )</nowiki></code> yields <math>\frac{7}{10}</math>. | *<code><nowiki>fractionalPart( 1/5 + 3/2 + 2 )</nowiki></code> yields <math>\frac{7}{10}</math>. | ||
</div>}} | </div>}} | ||
| − | {{ | + | {{Note|1=<br> |
| + | In Mathematics fractional part function is defined sometimes as<br> | ||
| + | :<math>x-\lfloor x\rfloor </math><br> | ||
| + | In other cases as<br> | ||
| + | :<math>sgn(x)(\mid x\mid-\lfloor \mid x\mid\rfloor) </math>. <br> | ||
| + | '''''GeoGebra''''' uses the second definition (also used by Mathematica).<br> | ||
| + | To obtain the first function you may use '''<code>f(x)=x-floor(x)</code>'''<br> | ||
| + | ; | ||
| + | See also [[Predefined Functions and Operators]].}} | ||
Revision as of 23:01, 29 September 2012
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This page is about a feature that is supported only in GeoGebra 4.2. |
- fractionalPart( <Expression> )
- Returns the fractional part of the expression.
Example:
fractionalPart( 6 / 5 )yields \frac{1}{5},fractionalPart( 1/5 + 3/2 + 2 )yields \frac{7}{10}.
Note:
In Mathematics fractional part function is defined sometimes as
- x-\lfloor x\rfloor
In other cases as
- sgn(x)(\mid x\mid-\lfloor \mid x\mid\rfloor) .
GeoGebra uses the second definition (also used by Mathematica).
To obtain the first function you may use f(x)=x-floor(x)
Comments
The following picture shows the two possible definitions of fractional part function, the lower one is used in GeoGebra.
