Summary of NACA 65A009 Wind Tunnel Data
19 x-axis data points
5 y-axis data points
x-tics 9, y-tics 4
Mesh 5 rows 19 columns
In order to actually extract the specific coefficients associated with individual monomial terms in the model function (rather than letting interp create the function internally), you need to use the programs shown below.
A polynomial in nvar variables of degree deg has a number of terms given by the function Nterms:
The number of variables of the polynomial is:
The number of data points is:
The degree of the fitting function:
Here are the two programs that extract the coefficients.
Call the program
The first column of I gives the power of the x term of each monomial corresponding to the power of the y term given in the second column. The rows of I and coeffs correspond. Therefore, you can define the model function using the following summation.
Comparing: