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Mathematica Link for EXCEL


I'm developing a Monte Carlo simulation in EXCEL using the @Risk
add-in.  At the end of  each iteration of the simulation, I would like
to use Mathematica to analyze the results of the iteration results, a
column of 360 values.

As I was developing the Mathematica code that I inended to use as EXCEL
functions, I used a column of values designed to test my code.
Everything worked to my satisfaction.  As soon as I started using the
data produced by the Monte Carlo simulation, my code still woked but
the process trigged a recalculation of the values in the EXCEL
spreadsheet.  The time to run the Mathematica based analysis of a
single iteration of the 10,000 iteration Monte Carlo Simulation  was
now considerably longer than when using the test data.

Is there anything that I can do (programming-wise) to prevent the
unnecessary recalculation of the EXCEL spreadsheet?.  

Thanks

Larry


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