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Could we build matrix with codition instruction?

• To: mathgroup at smc.vnet.net
• Subject: [mg23314] Could we build matrix with codition instruction?
• From: Coase Yang <cnc at ms6.hinet.net>
• Date: Mon, 1 May 2000 18:00:15 -0400 (EDT)
• Organization: Ntu
• Sender: owner-wri-mathgroup at wolfram.com

Dear All:

I want to construct an 4*4 upper triangular matrix with
conditional instruction, a[i,j]:
if j-i>=0, then a[[i,j]]=1
if j-i<0, then a[[i,j]]=0
Could anyone tell me how I could build this matrix with
list or Table form by conditional instruction inside?

Thank you very much.

Coase Yang

• Follow-Ups:
  • RE: Could we build matrix with codition instruction?
    • From: "Higinio Ramos Calle" <higra@gugu.usal.es>