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This relation returns for x = 12 a value of

y=46.45

Remarks

  1. In case you apply the symbolic addressing of the columns for the description of the point on the curve or surface to compute the differential for, e.g. "Par_x" and "Par_y", please make sure that your Telitab set contains these names. If not, an error message is generated and the calculation is stopped.
  2. If you use |1| as data header instead of |LEASQ1| it means that any special function in that expression referring to a data set Pno%=1 can access that data set.
  3. In addition to traditional two-dimensional interpolation it is also possible to perform matrix (n-dimensional) interpolation. In that case, a special Telitab set definition format can be applied, clarified by the following database which is an example of an interpolation in a matrix of power and propeller rotation rate on the basis of ship speed and propeller pitch setting (for the sake of compactness, the data set size was reduced): 

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