Re: local or global variables

*To*: mathgroup at smc.vnet.net*Subject*: [mg111011] Re: local or global variables*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Fri, 16 Jul 2010 07:00:03 -0400 (EDT)

Either should work if you use /. rather than \. Clear[f] f[x_] := Module[{}, sigma /. {{sigma -> 1}, {sigma -> 2}}] f[5] {1,2} Clear[f] f[x_] := Module[{sigma}, sigma /. {{sigma -> 1}, {sigma -> 2}}] f[5] {1,2} Bob Hanlon ---- lynette <xiaochu at gmail.com> wrote: ============= HI: I have encountered a problem as follow, can anyone help? thanks a lot. when sigma is defined as local variable, the function doesn't work f[x_]:=Module[ {sigma}, sigma \. {{sigma->1},{sigma->2}} ] when sigma is NOT defined as local variable, the function works f[x_]:=Module[ {}, sigma \. {{sigma->1},{sigma->2}} ]