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## RE: Draw a line through 2 points

**From**: |
Ted Harding |

**Subject**: |
RE: Draw a line through 2 points |

**Date**: |
Sat, 15 May 2004 15:57:30 +0100 (BST) |

On 15-May-04 Sue Stones wrote:
>* How do I draw a line through 2 points. Not just between the points*
>* but going off the graph on either side?*
>* *
>* sue*
You can do it by specifying two other points to define a line which
includes the two given points.
e.g. (adjust t1, t2 to your taste; the values below extend the line
between p1 and p2 to either side by 10 times the distance between
p1 and p2):
p1=[x1;y1]; p2=[x2;y2];
t1=(-10); t2=(+10);
P1=p1 + t1*(p2-p1) ; P2=p2 + t2*(p2-p1);
Now draw a line from P1 to P2 (when t1=0 and t2=0 you get the original
points p1 and p2).
Hope this helps,
Ted.
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Date: 15-May-04 Time: 15:57:30
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