Difference between revisions of "FractionalPart Function"
From GeoGebra Manual
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<noinclude>{{Manual Page|version=5.0}}</noinclude> | <noinclude>{{Manual Page|version=5.0}}</noinclude> | ||
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{{function|fractionalPart}} | {{function|fractionalPart}} | ||
;fractionalPart( <Expression> ) :Returns the fractional part of the expression. | ;fractionalPart( <Expression> ) :Returns the fractional part of the expression. | ||
{{examples| 1=<div> | {{examples| 1=<div> | ||
*<code><nowiki>fractionalPart( 6 / 5 )</nowiki></code> yields <math>\frac{1}{5}</math> in ''CAS View'', 0.2 in ''Algebra View'' | *<code><nowiki>fractionalPart( 6 / 5 )</nowiki></code> yields <math>\frac{1}{5}</math> in ''CAS View'', 0.2 in ''Algebra View'' | ||
| − | *<code><nowiki>fractionalPart( 1/5 + 3/2 + 2 )</nowiki></code> yields <math>\frac{7}{10}</math> in [[File:Menu view cas.svg|link=| | + | *<code><nowiki>fractionalPart( 1/5 + 3/2 + 2 )</nowiki></code> yields <math>\frac{7}{10}</math> in [[File:Menu view cas.svg|link=|16px]] ''CAS View'', 0.7 in [[File:Menu view algebra.svg|link=|16px]] ''Algebra View'' |
</div>}} | </div>}} | ||
{{Note|1=<br> | {{Note|1=<br> | ||
Revision as of 10:44, 5 August 2015
- fractionalPart( <Expression> )
- Returns the fractional part of the expression.
Examples:
fractionalPart( 6 / 5 )yields \frac{1}{5} in CAS View, 0.2 in Algebra ViewfractionalPart( 1/5 + 3/2 + 2 )yields \frac{7}{10} in
CAS View, 0.7 in 
Algebra View
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.
