SPECPR Users’ Manual Page 8-f21.1 F21: Calculate Nth Term Polynomials Alias: calc[poly] This routine calculates nth term polynomials where the maximum number of terms or coefficients is 256. This routine operates on the data set entered from math operations. Then it prompts you for a data set of coefficients (file ID and record number) for the polynomial: Y(n) = C(1) + C(2)X(n) + C(3)X(n)2 + C(4)X(n)3 + ..., where Y is the output array, X is the input array, C is the coefficient array. To execute the f21 function, in math operations type the file id and record number of the input file and f21. For example: v23f21 or v23calc After the routine title is printed type in the file id and record number of the file containing the coefficient values, then a space, then the number of terms of the polynomial. For example, if the coefficients were in v24 and there were 6 coefficients, you would type: v24 6 The program will then do the calculations and return to the math routine prompting you for the location to put the output file and the title etc. WARNING: be careful of overflows! When the number of terms, n, becomes large (like near or greater than 10), xn can get very large if x > 1.0.