Re: List to Expression

*To*: mathgroup at smc.vnet.net*Subject*: [mg106092] Re: List to Expression*From*: dh <dh at metrohm.com>*Date*: Fri, 1 Jan 2010 05:35:15 -0500 (EST)*References*: <hhhmm7$o90$1@smc.vnet.net>

Hi, you may e.g.use Fold to achieve this: ll = Reverse@Flatten@l; Fold[#2[#1] &, First[ll], Rest[ll]] Daniel On 31 Dez., 09:17, Spell <l_shar... at hotmail.com> wrote: > Hellp, > > I am having trouble converting a list into an "expression". For example suppose I have the following list expression. > l = {a, {b, {c, d}}} > > When I evaluate the FullForm version, I get an output with List as the Head. > List[a,List[b,List[c,d]]] > > But, I would like the following output instead: a[b[c,d]], wondering how this would be accomplised. > > PS: > Essentially, I have a FunctionSet with various functions in it. And would like to generate a tree of functions, from the FunctionSet. So, say I have functions from a to d in the set. Then, I can generate something like: d[a[b], c[d[a[b]]]. > > Thank you.