comp.lang.idl-pvwave archive - RDF feed
type: channel
description: Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
items: Array subscript question

Array subscript question
type: item
description: Can someone explain this behavior to me? I can't find anything in the documentation that states that repeated subscripts are handled differently. IDL> a = FINDGEN(5) IDL> i = [1, 2, 3] IDL> a[i] = a[i] + 10.0 IDL> PRINT, a 0.00000 11.0000 12.0000 13.0000 4.00000 This is the behavior I expect. IDL> a = FINDGEN(5) IDL> i = [2, 2, 2] IDL> a[i] = a[i] + 10.0 IDL> PRINT, a 0.00000 1.00000 12.0000 3.00000 4.00000 Why does it only do the operation *once* when IDL> HELP, a[i] <Expression> FLOAT = Array[3] IDL> a = FINDGEN(5) IDL> i = [2, 2, 2] IDL> a[i] = a[i] + [10.0, 10.0, 10.0] IDL> PRINT, a 0.00000 1.00000 12.0000 3.00000 4.00000 Even this doesn't help. Ken -- Dr. Kenneth P. Bowman, Professor 409-862-4060 Department of Meteorology 409-862-4466 fax Texas A&M University bowmanATcsrp.tamu.edu College Station, TX 77843-3150 Replace AT with @
creator: bowman
date: 2000-03-02T08:00:00-00:00