
Re: how to generate piecewise function from two lists
Posted:
Apr 28, 2013 5:17 AM


This is straightforward using the function Partition:
In[21]:= f={a,b}; r={0,1,2}; With[{rr=Partition[r,2,1]}, Piecewise[Table[{f[[i]], rr[[i,1]]<x<rr[[i,2]]}, {i,1,Length[f]}]]] // InputForm
Out[23]//InputForm= Piecewise[{{a, 0 < x < 1}, {b, 1 < x < 2}}, 0]
Fred Simons Eindhoven University of Technology
Op 2842013 7:00, S schreef: > Hello > > Suppose we have two lists > f={a,b} > r={0,1,2) > > In general, the lengths of f and r can vary but the length of f is always 1 less than length of r. > > Using the lists f and r, I want to define a piecewise function of the form: > > Piecewise[{{a,0<x<1},{b,1<x<2}}] i.e., having the form > > Piecewise[{{f[[1]],r[[1]]<x<r[[2]]},{f[[2]],r[[2]]<x<r[[3]]}}] > > Is there a way to define a piecewise function using f and r for the general case, as described above. > > Thanks > > S > > > >  > Geen virus gevonden in dit bericht. > Gecontroleerd door AVG  www.avg.com > Versie: 2013.0.3272 / Virusdatabase: 3162/6277  datum van uitgifte: 04/27/13 > >

