
Re: how to set initial values to symbolic variable array?
Posted:
Feb 28, 2013 9:24 PM


Not clear why you're calling f a function, or why you "manually" add the four elements of the array. To answer your question:
arr = Array[a, 4]; f = Total[arr]; f /. a[_] > 1
On Feb 27, 2013, at 11:45 PM, Jon <devout1977@gmail.com> wrote:
> > Dear All, > > Suppose I defined a symbolic variable array as > > Array[a,4] > > and defined a function as > > f = a[1] + a[2] + a[3] + a[4] > > I need to evaluate the value of f in the following way, > > f/.{a[1]>1,a[2]>1, ...} > > but specify each element of the array one by one is very troublesome, and I > wonder whether there is something like a group definition like > > f/.{a[1:4]>1} > > to define the four variables at the same time with the same value. > > Thanks for your help, > > Sincerely, > John >
 Murray Eisenberg murray@math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 5491020 (H) University of Massachusetts 413 5452838 (W) 710 North Pleasant Street fax 413 5451801 Amherst, MA 010039305

