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How do I draw an ellipse on excel, or can I?



 
 
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  #1  
Old April 9th, 2010, 07:55 PM posted to microsoft.public.excel.charting
m
external usenet poster
 
Posts: 143
Default How do I draw an ellipse on excel, or can I?

Hey,
I need to graphically display data in an ellipse. I was wondering can i do
so from the chart option in excel? or can it be done at all on excel?
Thanks

M
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  #2  
Old April 9th, 2010, 08:27 PM posted to microsoft.public.excel.charting
David Biddulph
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Posts: 8,714
Default How do I draw an ellipse on excel, or can I?

The chart option in Excel can chart a series. Use the XY (misleadingly
labelled "scatter") chart, not line chart.
If you want a series for an ellipse, you could remember that the equation
for an ellipse could be (x/a)^2+(y/b)^2=1
--
David Biddulph


"M" wrote in message
...
Hey,
I need to graphically display data in an ellipse. I was wondering can i
do
so from the chart option in excel? or can it be done at all on excel?
Thanks

M



  #3  
Old April 9th, 2010, 09:32 PM posted to microsoft.public.excel.charting
Bernard Liengme
external usenet poster
 
Posts: 516
Default How do I draw an ellipse on excel, or can I?

While David has given you a perfect mathematical approach, here is a slight
cheat
Plot a circle and then stretch the x dimension
x y
-1 0
-0.9 0.435889894 =sqrt(1-a2^2)
....
..1
..2
.....
..9
1
..9 -0.435889894 =-sqrt(1-a2^2)

.....
-1

You should use smaller increments around the 1 and -1 values for x to get a
smoother curve
best wishes
--
Bernard Liengme
Microsoft Excel MVP
http://people.stfx.ca/bliengme

"M" wrote in message
...
Hey,
I need to graphically display data in an ellipse. I was wondering can i
do
so from the chart option in excel? or can it be done at all on excel?
Thanks

M


 




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