Difference between revisions of "Direction Command"
From GeoGebra Manual
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<noinclude>{{Manual Page|version=4.2}}</noinclude> | <noinclude>{{Manual Page|version=4.2}}</noinclude> | ||
{{command|geometry}} | {{command|geometry}} | ||
| − | ; Direction[Line]: Yields the direction vector of the line. | + | ; Direction[ <Line> ]: Yields the direction vector of the line. |
:{{Example|1=<code>Direction[-2x + 3y + 1 = 0]</code> yields the vector <math>u= \begin{pmatrix} 3 \\ 2 \end{pmatrix} </math>}} | :{{Example|1=<code>Direction[-2x + 3y + 1 = 0]</code> yields the vector <math>u= \begin{pmatrix} 3 \\ 2 \end{pmatrix} </math>}} | ||
| − | : {{Note|1=A line with equation ''ax + by = c'' has the direction vector ''(b, - a)''.}} | + | :{{Note|1=A line with equation ''ax + by = c'' has the direction vector ''(b, - a)''.}} |
Revision as of 14:28, 11 July 2013
- Direction[ <Line> ]
- Yields the direction vector of the line.
- Example:
Direction[-2x + 3y + 1 = 0]yields the vector u= \begin{pmatrix} 3 \\ 2 \end{pmatrix}
- Note: A line with equation ax + by = c has the direction vector (b, - a).
