Thanks
I will try this ASAp.
My application of John's approach resulted in a correct scatter plot BUT
when I selected a "line chart" the chart repeated the "X" axis -- each pair
of nodes was connected but BUT the x-axis was " 01 01 12 12 12 12" so
the nodal pairs never connected.
Luke
"Tushar Mehta" wrote:
The 'nodal coordinates' would use the same frame of reference as the
original data. One possible algorithm would take the original data and
rewrite them in the format suggested by Jon so that a single series
would do the job.
Another algorithm would be to rewrite the data to be the eqivalent of a
depth-first search (to borrow a term from Computer Science). The
result would be:
0 100
1 110
2 121
1 110
2 100
1 110
0 100
1 90
2 100
1 90
2 81
Use the above for a single series XY Scatter chart with connecting
lines.
--
Regards,
Tushar Mehta
www.tushar-mehta.com
Excel, PowerPoint, and VBA add-ins, tutorials
Custom MS Office productivity solutions
In article , "=?
Utf-8?B?THVrZSBTcGFyIFVUQUZvcnRXb3J0aA==?=" <Luke Spar UTAFortWorth
@discussions.microsoft.com says...
I can sure try the second suggestion.
I like the VBA suggestion a lot. But if the nodal cooridnates are in
"points" then I am stumped---I do not know how to find them. The idea of
"points" versus "XY coordinates " has me crazy".
Thanks a lot, I will try the suggestion tomorrow.
"Jon Peltier" wrote:
You could probably write an algorithm in VBA that would generate the nodal
coordinates, then dump them into cell positions which will produce the appropriate
line segments. You could even have a pair of columns like this, with skipped lines,
to build the lattice from a single series.
0 100
1 110
0 100
1 90
1 110
2 121
1 110
2 100
1 90
2 100
1 90
2 81
etc. Select the range, blank rows included, and draw an XY Scatter chart
- Jon
-------
Jon Peltier, Microsoft Excel MVP
Peltier Technical Services
Tutorials and Custom Solutions
http://PeltierTech.com/
_______
Luke Spar UTAFortWorth wrote:
In the simpest case:
1)All nodes are governed by analytics that specify the value of an "up move"
and the tha value of a "down move".... for example
UP = 1.1
Down = 0.909
2) In all cases the starting value is given
3) 100 * (Up=1.10) gives 110
100* (Down = 0.909) give `90
110 * (Up = 1.10) gives 121 ( note 100 * UP*UP = 121)
110*(Down =0.909) gives ~100
90* (UP=1.1) gives ~ 100
90* (DOWN = 0.909) gives ~ 81
The example above is refereed to as "Recombining" since 100*UP*DOWN yield 100.
The UP and Down parameters can vary, by period, in more complex situations.
Thus the tree is "not recombining"
Luke
"Barb Reinhardt" wrote:
I suspect you'll need to have a different data series for each line. How
do you determine which nodes are connected to one another?
"Luke Spar UTAFortWorth" <Luke Spar
wrote in message ...
Would like to use XL to create a connected graph ( finance calls it a
binomial lattice). X axis iis the time period t=1,2,3,...T, Y is value.
XY scatter plots points OK. Need to connect points (nodes)--each node
except
for t=T has two lines coming out of it.
A 3-peiod example is shown below. Eventually need to generalilze.
Data is
reference T Value
NOde 1... 0 100
NODE 2... 1 110
NODE 3... 1 90
NODE 4... 2 121
NODE 5... 2 100
NODE 6... 2 81
FOR NOW:
want a line to connect NODE 1 to NODE 2
want a line to connect NODE 1 to NODE 3
want a line to connect NODE 2 to NODE 4
want a line to connect NODE 2 to NODE 5
want a line to connect NODE 3 to NODE 5
want a line to connect NODE 3 to NODE 6
Suggestions would be greatly appreciated.
Luke