Information of Nested Summations

Description

Information of Nested Summations

Usage

suminfo(sexpr, sort = 0, print = 0, debug = 0)

Arguments

Details

This function analyses an expression containing summations.

Value

A list of range, parent, level, sub, srange, body, oper, locspec
where
range starting and ending location of each summation: s( body, sub,range)

 parent   parent summation number: parent of top = 0
 level    summation level number: level of top = 1
 sub      subscript of the summation
 srange   range of the summation: a matrix consisting of (from,to)
 body     body of the summation
 oper     preceding operator or paren etc
 locspec  starting location of the spec.

Examples

sexp="s( s( (s(a3,{i3})+s(a4,{i4}))*s( s(a6,{i6}), {i5}), {i2}), {i1,1,n1})"
suminfo( sexp, print=1 )