- anlaysis with Xi -
For numerical integration and differentiation Xi computes a spline under tension through the data points. The use is straight forward:
( 1)>x=dincarr(100)/100; ( 2)>print(integrate(x,exp(x)+1,0,1)); <double> 2.71828 ( 3)>print(derive(x,exp(x),{0,1})); <dblarr> 1 2.7182787Please note that the function derive expects an array for desired positions.