Variable Name
Size
Description
xval
double
An input variable for the CUBSPL function.
- Generally, this variable is time or a function that returns a real number.
zval
double
An input variable for the CUBSPL function.
- The second variable is necessary for three dimensional spline functions.
- This variable must be a function that returns a real number. Otherwise, 0 is applied.
identity
double
The identity of Spline.
order
int
The interpolation methods for the functions (return the value if 0, return calculation for 1st order differential equation if 1, and return calculation for 2nd order differential equation if 2)
1) order = 0
2) order = 1
3) order = 2
array
double
errflg
int
Error flag. If the result of this argument is zero, there’s no error