Hi Nico,
Please see the following examples which shown the way of:
1. create the spline with anchor points
2. interpolate and connect the spline
3. subtract the baseline(spline) from the original data
for(int i=2;i<5;i++)
{
spline ix:=1!Col(5) iy:=1!(Col(1), Col($(i))) ox:=2!<new>;
//Col(5) is X for anchor points, create the Y values for anchor points by spline
interp1 ix:=1!Col(1) iy:=(1!Col(5), 2!Col($(i-1))) ox:=3!<new>;
//bridge the anchor point to baseine, using original X as baseline X
range a1=1!Col($(i));
range a2=3!Col($(i-1)); // substract the curve by baseline.
a1=a1-a2;
};
Best regards,
Jason Zhao
OriginLab Tech Service
