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>. | ||
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| − | {{note|1=In Mathematics fractional part function is sometimes defined as <math>x-\lfloor x\rfloor </math>, in other cases as <math>sgn(x)(\mid x\mid-\lfloor \mid x\mid\rfloor </math>. GeoGebra uses the second definition (also used by Mathematica). To obtain the first function you may use <code>f(x)=x-floor(x)</code>, see [[Predefined Functions and Operators]].}} | + | {{note|1=In Mathematics fractional part function is sometimes defined as <math>x-\lfloor x\rfloor </math>, in other cases as <math>sgn(x)(\mid x\mid-\lfloor \mid x\mid\rfloor) </math>. GeoGebra uses the second definition (also used by Mathematica). To obtain the first function you may use <code>f(x)=x-floor(x)</code>, see [[Predefined Functions and Operators]].}} |
Revision as of 13:23, 18 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 sometimes defined 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), see Predefined Functions and Operators.Comments
The following picture shows the two possible definitions of fractional part function, the lower one is used in GeoGebra.
