Visually add (graph) vectors

[Banaticus]

I'd like to visually add (graph) vectors, up to three of them. I'
prefer to simply add them as polar coordinates, although I can easil
convert them to rectangular coordinates. I'd like Excel to graph on
vector after another, adding the tail of each vector to the head of th
previous vector (or the origin). At the end, I'd like Excel to draw
vector from the origin of the graph to the head of the last vector an
give the resulting polar coordinates (converting as required). In th
following table I show how I'd like to format the initial pola
coordinates -- it also shows the calculated x/y end points for the sam
line stretching from the origin. I have four vectors in this sampl
table just so that I can check my x,y calculations.

Code
-------------------
Vectors
Mag Angle Ref Ang x y
100 50 50 64.2788 76.6044
150 170 10 -147.7212 26.0472
50 185 5 -49.8097 -4.3578
50 275 85 4.3578 -49.809
-------------------


The code for the Ref Angle on the first line is:
=IF(B3<90,B3,IF(B3<=180,180-B3,IF(B3<=270,B3-180,IF(B3<=360,360-B3,"ERR"))))

The code for x on the first line is:
=IF(OR(B3<90,B3>270),ROUND(A3*COS(RADIANS(C3)),4),ROUND(A3*COS(RADIANS(C3))*-1,4))

The code for y on the first line is:
=IF(B3<180,ROUND(A3*SIN(RADIANS(C3)),4),ROUND(A3*SIN(RADIANS(C3))*-1,4)

 

[Banaticus]

Check out this attachment -- I'm looking to add arrowheads to the points
and change the color of the final line (the resultant).


+-------------------------------------------------------------------+
|Filename: lab 3.zip |
|Download: http://www.excelforum.com/attachment.php?postid=4944 |
+-------------------------------------------------------------------+

 

[Jon Peltier]

You might be able to adapt this approach to your project:

http://peltiertech.com/Excel/Charts/VBAdraw.html

- Jon