Difference between revisions of "Direction Command"
From GeoGebra Manual
m |
m (Text replace - ";(.*)\[(.*)\]" to ";$1($2)") |
||
Line 1: | Line 1: | ||
<noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|geometry}} | <noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|geometry}} | ||
− | ; Direction | + | ; 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 17:15, 7 October 2017
- 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).