You can already do this in XL!

Click a point to select the entire plotted series. Pause. Click the point
again. Now, click and drag up or down. If the plotted point corresponds to
a number in a cell, that number will be changed. If it is a formula, XL
will show a Goal Seek dialog so that the actual source can be changed
appropriately.

That technique is used as a part of
Read X and Y value of any point on a chart
http://www.tushar-mehta.com/excel/ti...lue/index.html

and

the goal seek part is documented in
http://www.hull.ac.uk/ict/excexpwhatif_133.pdf

--
Regards,

Tushar Mehta
www.tushar-mehta.com
Excel, PowerPoint, and VBA add-ins, tutorials
Custom MS Office productivity solutions

In article ,
says...
?:

Who knows:

a) how soon either Excel or PowerPoint might allow changes to data by
directly re-forming the data's graph(chart)
(e.g. by mouse-dragging edges, bar-ends, or other such elements),

or

b) whether there is an add-on (or auxiliary app) already available (or that
someone is working on) to enable such data-altering in those two main apps,

or

c) someone who might like to help make &/or sell such an add-on for one or
more such popular apps

?


Thanks!

& do pls. fwd this to all you think might be able to help us out...


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