keyword | type | mini sample | keyword sequence is insignificant |
XVector | vec | XV=year | (required ) a vector with N nodes of the independent variable in rising order
|
YVector | arr | YV=linear | (required )
|
Init | --- | Init | (required on 1st call to cubic interpolation ) to initialize the Akima coefficients |
Xi | num | X=3.1 | interpolate at Xi, default is Xi=0 |
X2 | num | x2=3.9 | integrate the interpolated data from Xi to X2 |
Find | num | find=y | find x closest to Xi with interpolated value equal to y |
DYdx | --- | dy | 1st derivative of interpolated data at Xi |
DYdx | num | dy=yprime | find x closest to Xi with 1st derivative equal to yprime |
D2ydx | --- | d2y | 2nd derivative of interpolated data at Xi |
D2ydy | num | d2y=y2prime | find x closest to Xi with 2nd derivative equal to y2prime |
ERror | LBL | ER=99 | on error jump to ⇾ label 99 |